Lesson 2: Run Queries with ANSI SQL

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href="/docs/configuring-inbound-impersonation/">Configuring Inbound Impersonation</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-user-impersonation-with-hive-authorization/">Configuring User Impersonation with Hive Authorization</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-user-security/">Configuring User Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-plain-security/">Configuring Plain Security</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-ssl-tls-for-encryption/">Configuring SSL/TLS for Encryption</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-libpam4j-as-the-pam-authenticator/">Using libpam4j as the PAM Authenticator</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-jpam-as-the-pam-authenticator/">Using jpam as the PAM Authenticator</a></li> <li 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href="javascript: void(0);">Configuring a Multitenant Cluster</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-a-multitenant-cluster-introduction/">Configuring a Multitenant Cluster Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-multitenant-resources/">Configuring Multitenant Resources</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-resources-for-a-shared-drillbit/">Configuring Resources for a Shared Drillbit</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Configuration Options</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/configuration-options-introduction/">Configuration Options Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/start-up-options/">Start-Up Options</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/planning-and-execution-options/">Planning and Execution Options</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/persistent-configuration-storage/">Persistent Configuration Storage</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/global-query-list/">Global Query List</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/ports-and-bind-addresses-used-by-drill/">Ports and Bind Addresses Used by Drill</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-the-drill-shell/">Configuring the Drill Shell</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/configuring-cgroups-to-control-cpu-usage/">Configuring cgroups to Control CPU Usage</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Connect a Data Source</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/connect-a-data-source-introduction/">Connect a Data Source Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/storage-plugin-registration/">Storage Plugin Registration</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Storage Plugin Configuration</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/plugin-configuration-basics/">Plugin Configuration Basics</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-storage-plugins/">Configuring Storage Plugins</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/storage-plugin-authentication-modes/">Storage plugin authentication modes</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/workspaces/">Workspaces</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drill-default-input-format/">Drill Default Input Format</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/file-system-storage-plugin/">File System Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hbase-storage-plugin/">HBase Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hive-storage-plugin/">Hive Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/rdbms-storage-plugin/">RDBMS Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/mongodb-storage-plugin/">MongoDB Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/mapr-db-format/">MapR-DB Format</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/s3-storage-plugin/">S3 Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/oci-os-storage-plugin/">OCI OS Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/opentsdb-storage-plugin/">OpenTSDB Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/kafka-storage-plugin/">Kafka Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/azure-blob-storage-plugin/">Azure Blob Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/druid-storage-plugin/">Druid Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/http-storage-plugin/">HTTP Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/elasticsearch-storage-plugin/">ElasticSearch Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/splunk-storage-plugin/">Splunk Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/cassandra-storage-plugin/">Cassandra Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/dropbox-storage-plugin/">Dropbox Storage Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/google-sheets-storage-plugin/">Google Sheets Storage Plugin</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">ODBC/JDBC Interfaces</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/interfaces-introduction/">Interfaces Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/using-the-jdbc-driver/">Using the JDBC Driver</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/using-jdbc-with-squirrel-on-windows/">Using JDBC with SQuirreL on Windows</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Installing the ODBC Driver</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-linux/">Installing the Driver on Linux</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-mac-os-x/">Installing the Driver on Mac OS X</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/installing-the-driver-on-windows/">Installing the Driver on Windows</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Configuring ODBC</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/odbc-configuration-reference/">ODBC Configuration Reference</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/logging-and-tracing/">Logging and Tracing</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-linux/">Configuring ODBC on Linux</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-mac-os-x/">Configuring ODBC on Mac OS X</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-odbc-on-windows/">Configuring ODBC on Windows</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/testing-the-odbc-connection/">Testing the ODBC Connection</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Using Drill Explorer</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/drill-explorer-introduction/">Drill Explorer Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/connecting-drill-explorer-to-data/">Connecting Drill Explorer to Data</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/browsing-data-and-defining-views/">Browsing Data and Defining Views</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Using Drill with BI Tools</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-with-bi-tools-introduction/">Using Drill with BI Tools Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/tableau-examples/">Tableau Examples</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-microstrategy-analytics-with-apache-drill/">Using MicroStrategy Analytics with Apache Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-tibco-spotfire-desktop-with-drill/">Using Tibco Spotfire Desktop with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-tibco-spotfire-server-with-drill/">Configuring Tibco Spotfire Server with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-qlik-sense-with-drill/">Using Qlik Sense with Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-10-2/">Using Apache Drill with Tableau 10.2</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-desktop/">Using Apache Drill with Tableau 9 Desktop</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-apache-drill-with-tableau-9-server/">Using Apache Drill with Tableau 9 Server</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-information-builders-webfocus-with-apache-drill/">Using Information Builders’ WebFOCUS with Apache Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-jreport-with-drill/">Configuring JReport with Drill</a></li> </ul> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Query Data</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/query-data-introduction/">Query Data Introduction</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Querying a File System</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-a-file-system-introduction/">Querying a File System Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-avro-files/">Querying Avro Files</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-json-files/">Querying JSON Files</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-parquet-files/">Querying Parquet Files</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-plain-text-files/">Querying Plain Text Files</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-directories/">Querying Directories</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-sequence-files/">Querying Sequence Files</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hbase/">Querying HBase</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Querying Complex Data</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-complex-data-introduction/">Querying Complex Data Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sample-data-donuts/">Sample Data: Donuts</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-flat-data/">Selecting Flat Data</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/using-sql-functions-clauses-and-joins/">Using SQL Functions, Clauses, and Joins</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-nested-data-for-a-column/">Selecting Nested Data for a Column</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/selecting-multiple-columns-within-nested-data/">Selecting Multiple Columns Within Nested Data</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/querying-hive/">Querying Hive</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/querying-the-information-schema/">Querying the INFORMATION SCHEMA</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Querying Indexes</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/querying-indexes-introduction/">Querying Indexes Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/queries-that-qualify-for-index-based-query-plans/">Queries that Qualify for Index-Based Query Plans</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/types-of-indexes/">Types of Indexes</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/index-selection/">Index Selection</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/designing-indexes-for-your-queries/">Designing Indexes for Your Queries</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/configuring-index-planning/">Configuring Index Planning</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/verifying-index-use/">Verifying Index Use</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/querying-system-tables/">Querying System Tables</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-and-canceling-queries-in-the-drill-web-ui/">Monitoring and Canceling Queries in the Drill Web UI</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Performance Tuning</a></li> <ul style="display: none"> <li class="toctree-l2"><a href="javascript: void(0);">Drill Metastore</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/using-drill-metastore/">Using Drill Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drill-iceberg-metastore/">Drill Iceberg Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/rdbms-metastore/">RDBMS Metastore</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/mongo-metastore/">Mongo Metastore</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/performance-tuning-introduction/">Performance Tuning Introduction</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Partition Pruning</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/partition-pruning-introduction/">Partition Pruning Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/how-to-partition-data/">How to Partition Data</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/asynchronous-parquet-reader/">Asynchronous Parquet Reader</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/optimizing-parquet-metadata-reading/">Optimizing Parquet Metadata Reading</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-filter-pushdown/">Parquet Filter Pushdown</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hive-metadata-caching/">Hive Metadata Caching</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/choosing-a-storage-format/">Choosing a Storage Format</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Query Plans and Tuning</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans-and-tuning-introduction/">Query Plans and Tuning Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/join-planning-guidelines/">Join Planning Guidelines</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/guidelines-for-optimizing-aggregation/">Guidelines for Optimizing Aggregation</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/modifying-query-planning-options/">Modifying Query Planning Options</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sort-based-and-hash-based-memory-constrained-operators/">Sort-Based and Hash-Based Memory-Constrained Operators</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/enabling-query-queuing/">Enabling Query Queuing</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/throttling/">Throttling</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/controlling-parallelization-to-balance-performance-with-multi-tenancy/">Controlling Parallelization to Balance Performance with Multi-Tenancy</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Identifying Performance Issues</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/query-plans/">Query Plans</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/query-profiles/">Query Profiles</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Performance Tuning Reference</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/query-profile-column-descriptions/">Query Profile Column Descriptions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/physical-operators/">Physical Operators</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/monitoring-metrics/">Monitoring Metrics</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Log and Debug</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/log-and-debug-introduction/">Log and Debug Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/error-messages/">Error Messages</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/modify-logback-xml/">Modify logback.xml</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/review-the-java-stack-trace/">Review the Java Stack Trace</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/query-audit-logging/">Query Audit Logging</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">SQL Reference</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/sql-reference-introduction/">SQL Reference Introduction</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Data Types</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/supported-data-types/">Supported Data Types</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-and-timestamp/">Date, Time, and Timestamp</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/handling-different-data-types/">Handling Different Data Types</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/lexical-structure/">Lexical Structure</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/operators/">Operators</a></li> <li class="toctree-l2"><a href="javascript: void(0);">SQL Functions</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/about-sql-function-examples/">About SQL Function Examples</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/math-and-trig/">Math and Trig</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/statistical/">Statistical</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-conversion/">Data Type Conversion</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/data-type-functions/">Data Type Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/date-time-functions-and-arithmetic/">Date/Time Functions and Arithmetic</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/string-manipulation/">String Manipulation</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-and-aggregate-statistical/">Aggregate and Aggregate Statistical</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/functions-for-handling-nulls/">Functions for Handling Nulls</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/phonetic-functions/">Phonetic Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/string-distance-functions/">String Distance Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/cryptography-functions/">Cryptography Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sql-dialect-compatibility-functions/">SQL dialect compatibility functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/gis-functions/">GIS functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/time-series-analysis-functions/">Time Series Analysis Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/ip-networking-functions/">IP Networking functions</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">SQL Window Functions</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-introduction/">SQL Window Functions Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/aggregate-window-functions/">Aggregate Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/ranking-window-functions/">Ranking Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/value-window-functions/">Value Window Functions</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/sql-window-functions-examples/">SQL Window Functions Examples</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Nested Data Functions</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/nested-data-limitations/">Nested Data Limitations</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/flatten/">FLATTEN</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/kvgen/">KVGEN</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-count/">REPEATED_COUNT</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/repeated-contains/">REPEATED_CONTAINS</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/list-creation-functions/">COLLECT_LIST</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/query-directory-functions/">Query Directory Functions</a></li> <li class="toctree-l2"><a href="javascript: void(0);">SQL Commands</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/supported-sql-commands/">Supported SQL Commands</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/analyze-table-refresh-metadata/">ANALYZE TABLE REFRESH METADATA</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/analyze-table-compute-statistics/">ANALYZE TABLE COMPUTE STATISTICS</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/set/">SET</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/refresh-table-metadata/">REFRESH TABLE METADATA</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/reset/">RESET</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/alter-system/">ALTER SYSTEM</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-or-replace-schema/">CREATE OR REPLACE SCHEMA</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-table-as-ctas/">CREATE TABLE AS (CTAS)</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-temporary-table-as-cttas/">CREATE TEMPORARY TABLE AS (CTTAS)</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-function-using-jar/">CREATE FUNCTION USING JAR</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/partition-by-clause/">PARTITION BY Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/create-view/">CREATE VIEW</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/describe/">DESCRIBE</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drop-function-using-jar/">DROP FUNCTION USING JAR</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drop-table/">DROP TABLE</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/drop-view/">DROP VIEW</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/explain/">EXPLAIN</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/lateral-join/">LATERAL Join</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/select/">SELECT</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/select-list/">SELECT List</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/from-clause/">FROM Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/group-by-clause/">GROUP BY Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/having-clause/">HAVING Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/limit-clause/">LIMIT Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/offset-clause/">OFFSET Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/order-by-clause/">ORDER BY Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/set-operators/">Set Operators</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/where-clause/">WHERE Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/with-clause/">WITH Clause</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/show-databases-and-show-schemas/">SHOW DATABASES and SHOW SCHEMAS</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/show-files/">SHOW FILES</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/show-tables/">SHOW TABLES</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/use/">USE</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/pivot-operators/">Pivot Operators</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">SQL Conditional Expressions</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/case/">CASE</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/reserved-keywords/">Reserved Keywords</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/sql-extensions/">SQL Extensions</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Data Sources and File Formats</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/data-sources-and-file-formats-introduction/">Data Sources and File Formats Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hive-to-drill-data-type-mapping/">Hive-to-Drill Data Type Mapping</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/deploying-and-using-a-hive-udf/">Deploying and Using a Hive UDF</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/parquet-format/">Parquet Format</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/logfile-plugin/">Logfile Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/json-data-model/">JSON Data Model</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/text-files-csv-tsv-psv/">Text Files: CSV, TSV, PSV</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/sequence-files/">Sequence Files</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/httpd-format-plugin/">HTTPD Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/image-metadata-format-plugin/">Image Metadata Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/syslog-format-plugin/">Syslog Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/ltsv-format-plugin/">LTSV Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/spss-format-plugin/">SPSS Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/esri-shapefile-format-plugin/">ESRI Shapefile Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/excel-format-plugin/">Excel Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/hdf5-format-plugin/">HDF5 Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/ms-access-format-plugin/">Microsoft Access Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/xml-format-plugin/">XML Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/iceberg-format-plugin/">Iceberg Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/delta-lake-format-plugin/">Delta Lake Format Plugin</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/sas-format-plugin/">SAS Format Plugin</a></li> </ul> <li class="toctree-l1"><a href="javascript: void(0);">Develop Custom Functions</a></li> <ul style="display: none"> <li class="toctree-l2"><a class="reference internal" href="/docs/develop-custom-functions-introduction/">Develop Custom Functions Introduction</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/developing-a-simple-function/">Developing a Simple Function</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/tutorial-develop-a-simple-function/">Tutorial: Develop a Simple Function</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/developing-an-aggregate-function/">Developing an Aggregate Function</a></li> <li class="toctree-l2"><a href="javascript: void(0);">Adding Custom Functions to Drill</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/adding-custom-functions-to-drill-introduction/">Adding Custom Functions to Drill Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/manually-adding-custom-functions-to-drill/">Manually Adding Custom Functions to Drill</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/creating-custom-authenticators/">Creating Custom Authenticators</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/dynamic-udfs/">Dynamic UDFs</a></li> </ul> <li class="toctree-l2"><a class="reference internal" href="/docs/using-custom-functions-in-queries/">Using Custom Functions in Queries</a></li> <li class="toctree-l2"><a class="reference internal" href="/docs/custom-function-interfaces/">Custom Function Interfaces</a></li> </ul> <li class="toctree-l1"><a class="reference internal" href="/docs/troubleshooting/">Troubleshooting</a></li> <li class="toctree-l1"><a href="javascript: void(0);">Developer Information</a></li> <ul style="display: none"> <li class="toctree-l2"><a href="javascript: void(0);">REST API</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/rest-api-introduction/">REST API Introduction</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/submitting-queries-from-the-rest-api-when-impersonation-is-enabled-and-authentication-is-disabled/">Submitting Queries from the REST API when Impersonation is Enabled and Authentication is Disabled</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/use-postman-to-run-sql-queries-on-drill-data-sources/">Use Postman to Run SQL Queries on Drill Data Sources</a></li> </ul> <li class="toctree-l2"><a href="javascript: void(0);">Develop Drill</a></li> <ul style="display: none"> <li class="toctree-l3"><a class="reference internal" href="/docs/compiling-drill-from-source/">Compiling Drill from Source</a></li> <li class="toctree-l3"><a class="reference internal" href="/docs/useful-information-for-drill-developers/">Useful Information for Drill Developers</a></li> </ul> <li class="toctree-l2"><a href="javascript: 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Queries with ANSI SQL</li> </nav> <div class="main-content-wrapper"> <div class="main-content"> <a class="edit-link" href="https://github.com/apache/drill-site/blob/master/_docs/en/tutorials/learn-drill-with-the-mapr-sandbox/040-lesson-2-run-queries-with-ansi-sql.md" target="_blank"><i class="fa fa-pencil-square-o"></i></a> <div class="int_title left"> <h1>Lesson 2: Run Queries with ANSI SQL</h1> </div>  <div class="int_text" align="left"> <h2 id="goal">Goal</h2> <p>This lesson shows how to do some standard SQL analysis in Apache Drill: for example, summarizing data by using simple aggregate functions and connecting data sources by using joins. Note that Apache Drill provides ANSI SQL support, not a “SQL-like” interface.</p> <h2 id="queries-in-this-lesson">Queries in This Lesson</h2> <p>Now that you know what the data sources look like in their raw form, using select * queries, try running some simple but more useful queries on each data source. These queries demonstrate how Drill supports ANSI SQL constructs and also how you can combine data from different data sources in a single SELECT statement.</p> <ul> <li>Show an aggregate query on a single file or table. Use GROUP BY, WHERE, HAVING, and ORDER BY clauses.</li> <li>Perform joins between Hive, MapR-DB, and file system data sources.</li> <li>Use table and column aliases.</li> <li>Create a Drill view.</li> </ul> <h2 id="aggregation">Aggregation</h2> <h3 id="set-the-schema-to-hive">Set the schema to hive:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> use hive.`default`; |-------|-------------------------------------------| | ok | summary | |-------|-------------------------------------------| | true | Default schema changed to [hive.default] | |-------|-------------------------------------------| 1 row selected </code></pre></div></div> <h3 id="return-sales-totals-by-month">Return sales totals by month:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select `month`, sum(order_total) from orders group by `month` order by 2 desc; |------------|---------| | month | EXPR$1 | |------------|---------| | June | 950481 | | May | 947796 | | March | 836809 | | April | 807291 | | July | 757395 | | October | 676236 | | August | 572269 | | February | 532901 | | September | 373100 | | January | 346536 | |------------|---------| 10 rows selected </code></pre></div></div> <p>Drill supports SQL aggregate functions such as SUM, MAX, AVG, and MIN. Standard SQL clauses work in the same way in Drill queries as in relational database queries.</p> <p>Note that back ticks are required for the “month” column only because “month” is a reserved word in SQL.</p> <h3 id="return-the-top-20-sales-totals-by-month-and-state">Return the top 20 sales totals by month and state:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select `month`, state, sum(order_total) as sales from orders group by `month`, state order by 3 desc limit 20; |-----------|--------|---------| | month | state | sales | |-----------|--------|---------| | May | ca | 119586 | | June | ca | 116322 | | April | ca | 101363 | | March | ca | 99540 | | July | ca | 90285 | | October | ca | 80090 | | June | tx | 78363 | | May | tx | 77247 | | March | tx | 73815 | | August | ca | 71255 | | April | tx | 68385 | | July | tx | 63858 | | February | ca | 63527 | | June | fl | 62199 | | June | ny | 62052 | | May | fl | 61651 | | May | ny | 59369 | | October | tx | 55076 | | March | fl | 54867 | | March | ny | 52101 | |-----------|--------|---------| 20 rows selected </code></pre></div></div> <p>Note the alias for the result of the SUM function. Drill supports column aliases and table aliases.</p> <h2 id="having-clause">HAVING Clause</h2> <p>This query uses the HAVING clause to constrain an aggregate result.</p> <h3 id="set-the-workspace-to-dfsclicks">Set the workspace to dfs.clicks</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> use dfs.clicks; |-------|-----------------------------------------| | ok | summary | |-------|-----------------------------------------| | true | Default schema changed to [dfs.clicks] | |-------|-----------------------------------------| 1 row selected </code></pre></div></div> <h3 id="return-total-number-of-clicks-for-devices-that-indicate-high-click-throughs">Return total number of clicks for devices that indicate high click-throughs:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select t.user_info.device, count(*) from `clicks/clicks.json` t group by t.user_info.device having count(*) > 1000; |---------|---------| | EXPR$0 | EXPR$1 | |---------|---------| | IOS5 | 11814 | | AOS4.2 | 5986 | | IOS6 | 4464 | | IOS7 | 3135 | | AOS4.4 | 1562 | | AOS4.3 | 3039 | |---------|---------| 6 rows selected </code></pre></div></div> <p>The aggregate is a count of the records for each different mobile device in the clickstream data. Only the activity for the devices that registered more than 1000 transactions qualify for the result set.</p> <h2 id="union-operator">UNION Operator</h2> <p>Use the same workspace as before (dfs.clicks).</p> <h3 id="combine-clicks-activity-from-before-and-after-the-marketing-campaign">Combine clicks activity from before and after the marketing campaign</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select t.trans_id transaction, t.user_info.cust_id customer from `clicks/clicks.campaign.json` t union all select u.trans_id, u.user_info.cust_id from `clicks/clicks.json` u limit 5; |-------------|------------| | transaction | customer | |-------------|------------| | 35232 | 18520 | | 31995 | 17182 | | 35760 | 18228 | | 37090 | 17015 | | 37838 | 18737 | |-------------|------------| </code></pre></div></div> <p>This UNION ALL query returns rows that exist in two files (and includes any duplicate rows from those files): <code class="language-plaintext highlighter-rouge">clicks.campaign.json</code> and <code class="language-plaintext highlighter-rouge">clicks.json</code>.</p> <h2 id="subqueries">Subqueries</h2> <h3 id="set-the-workspace-to-hive">Set the workspace to hive:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> use hive.`default`; |-------|-------------------------------------------| | ok | summary | |-------|-------------------------------------------| | true | Default schema changed to [hive.default] | |-------|-------------------------------------------| 1 row selected </code></pre></div></div> <h3 id="compare-order-totals-across-states">Compare order totals across states:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select ny_sales.cust_id, ny_sales.total_orders, ca_sales.total_orders from (select o.cust_id, sum(o.order_total) as total_orders from hive.orders o where state = 'ny' group by o.cust_id) ny_sales left outer join (select o.cust_id, sum(o.order_total) as total_orders from hive.orders o where state = 'ca' group by o.cust_id) ca_sales on ny_sales.cust_id = ca_sales.cust_id order by ny_sales.cust_id limit 20; |------------|------------|------------| | cust_id | ny_sales | ca_sales | |------------|------------|------------| | 1001 | 72 | 47 | | 1002 | 108 | 198 | | 1003 | 83 | null | | 1004 | 86 | 210 | | 1005 | 168 | 153 | | 1006 | 29 | 326 | | 1008 | 105 | 168 | | 1009 | 443 | 127 | | 1010 | 75 | 18 | | 1012 | 110 | null | | 1013 | 19 | null | | 1014 | 106 | 162 | | 1015 | 220 | 153 | | 1016 | 85 | 159 | | 1017 | 82 | 56 | | 1019 | 37 | 196 | | 1020 | 193 | 165 | | 1022 | 124 | null | | 1023 | 166 | 149 | | 1024 | 233 | null | |------------|------------|------------| </code></pre></div></div> <p>This example demonstrates Drill support for subqueries.</p> <h2 id="cast-function">CAST Function</h2> <h3 id="use-the-maprdb-workspace">Use the maprdb workspace:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> use maprdb; |-------|-------------------------------------| | ok | summary | |-------|-------------------------------------| | true | Default schema changed to [maprdb] | |-------|-------------------------------------| 1 row selected (0.088 seconds) </code></pre></div></div> <h3 id="return-customer-data-with-appropriate-data-types">Return customer data with appropriate data types</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select cast(row_key as int) as cust_id, cast(t.personal.name as varchar(20)) as name, cast(t.personal.gender as varchar(10)) as gender, cast(t.personal.age as varchar(10)) as age, cast(t.address.state as varchar(4)) as state, cast(t.loyalty.agg_rev as dec(7,2)) as agg_rev, cast(t.loyalty.membership as varchar(20)) as membership from customers t limit 5; |----------|----------------------|-----------|-----------|--------|----------|-------------| | cust_id | name | gender | age | state | agg_rev | membership | |----------|----------------------|-----------|-----------|--------|----------|-------------| | 10001 | "Corrine Mecham" | "FEMALE" | "15-20" | "va" | 197.00 | "silver" | | 10005 | "Brittany Park" | "MALE" | "26-35" | "in" | 230.00 | "silver" | | 10006 | "Rose Lokey" | "MALE" | "26-35" | "ca" | 250.00 | "silver" | | 10007 | "James Fowler" | "FEMALE" | "51-100" | "me" | 263.00 | "silver" | | 10010 | "Guillermo Koehler" | "OTHER" | "51-100" | "mn" | 202.00 | "silver" | |----------|----------------------|-----------|-----------|--------|----------|-------------| </code></pre></div></div> <p>Note the following features of this query:</p> <ul> <li>The CAST function is required for every column in the table. This function returns the MapR-DB/HBase binary data as readable integers and strings. Alternatively, you can use CONVERT_TO/CONVERT_FROM functions to decode the string columns. CONVERT_TO/CONVERT_FROM are more efficient than CAST in most cases. Use only CONVERT_TO to convert binary types to any type other than VARCHAR.</li> <li>The row_key column functions as the primary key of the table (a customer ID in this case).</li> <li>The table alias t is required; otherwise the column family names would be parsed as table names and the query would return an error.</li> </ul> <h3 id="remove-the-quotes-from-the-strings">Remove the quotes from the strings:</h3> <p>You can use the regexp_replace function to remove the quotes around the strings in the query results. For example, to return a state name va instead of “va”:</p> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select cast(row_key as int), regexp_replace(cast(t.address.state as varchar(10)),'"','') from customers t limit 1; |------------|------------| | EXPR$0 | EXPR$1 | |------------|------------| | 10001 | va | |------------|------------| 1 row selected </code></pre></div></div> <h2 id="create-view-command">CREATE VIEW Command</h2> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> use dfs.views; |-------|----------------------------------------| | ok | summary | |-------|----------------------------------------| | true | Default schema changed to [dfs.views] | |-------|----------------------------------------| 1 row selected </code></pre></div></div> <h3 id="use-a-mutable-workspace">Use a mutable workspace:</h3> <p>A mutable (or writable) workspace is a workspace that is enabled for “write” operations. This attribute is part of the storage plugin configuration. You can create Drill views and tables in mutable workspaces.</p> <h3 id="create-a-view-on-a-mapr-db-table">Create a view on a MapR-DB table</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> create or replace view custview as select cast(row_key as int) as cust_id, cast(t.personal.name as varchar(20)) as name, cast(t.personal.gender as varchar(10)) as gender, cast(t.personal.age as varchar(10)) as age, cast(t.address.state as varchar(4)) as state, cast(t.loyalty.agg_rev as dec(7,2)) as agg_rev, cast(t.loyalty.membership as varchar(20)) as membership from maprdb.customers t; |-------|-------------------------------------------------------------| | ok | summary | |-------|-------------------------------------------------------------| | true | View 'custview' created successfully in 'dfs.views' schema | |-------|-------------------------------------------------------------| 1 row selected </code></pre></div></div> <p>Drill provides CREATE OR REPLACE VIEW syntax similar to relational databases to create views. Use the OR REPLACE option to make it easier to update the view later without having to remove it first. Note that the FROM clause in this example must refer to maprdb.customers. The MapR-DB tables are not directly visible to the dfs.views workspace.</p> <p>Unlike a traditional database where views typically are DBA/developer-driven operations, file system-based views in Drill are very lightweight. A view is simply a special file with a specific extension (.drill). You can store views even in your local file system or point to a specific workspace. You can specify any query against any Drill data source in the body of the CREATE VIEW statement.</p> <p>Drill provides a decentralized metadata model. Drill is able to query metadata defined in data sources such as Hive, HBase, and the file system. Drill also supports the creation of metadata in the file system.</p> <h3 id="query-data-from-the-view">Query data from the view:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select * from custview limit 1; |----------|-------------------|-----------|----------|--------|----------|-------------| | cust_id | name | gender | age | state | agg_rev | membership | |----------|-------------------|-----------|----------|--------|----------|-------------| | 10001 | "Corrine Mecham" | "FEMALE" | "15-20" | "va" | 197.00 | "silver" | |----------|-------------------|-----------|----------|--------|----------|-------------| 1 row selected </code></pre></div></div> <p>Once the users know what data is available by exploring it directly from the file system, views can be used as a way to read the data into downstream tools such as Tableau and MicroStrategy for analysis and visualization. For these tools, a view appears simply as a “table” with selectable “columns” in it.</p> <h2 id="query-across-data-sources">Query Across Data Sources</h2> <p>Continue using <code class="language-plaintext highlighter-rouge">dfs.views</code> for this query.</p> <h3 id="join-the-customers-view-and-the-orders-table">Join the customers view and the orders table:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select membership, sum(order_total) as sales from hive.orders, custview where orders.cust_id=custview.cust_id group by membership order by 2; |------------|------------| | membership | sales | |------------|------------| | "basic" | 380665 | | "silver" | 708438 | | "gold" | 2787682 | |------------|------------| 3 rows selected </code></pre></div></div> <p>In this query, we are reading data from a MapR-DB table (represented by custview) and combining it with the order information in Hive. When doing cross data source queries such as this, you need to use fully qualified table/view names. For example, the orders table is prefixed by “hive,” which is the storage plugin name registered with Drill. We are not using any prefix for “custview” because we explicitly switched the dfs.views workspace where custview is stored.</p> <p>Note: If the results of any of your queries appear to be truncated because the rows are wide, set the maximum width of the display to 10000:</p> <p>Do not use a semicolon for this SET command.</p> <h3 id="join-the-customers-orders-and-clickstream-data">Join the customers, orders, and clickstream data:</h3> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>0: jdbc:drill:> select custview.membership, sum(orders.order_total) as sales from hive.orders, custview, dfs.`/mapr/demo.mapr.com/data/nested/clicks/clicks.json` c where orders.cust_id=custview.cust_id and orders.cust_id=c.user_info.cust_id group by custview.membership order by 2; |------------|------------| | membership | sales | |------------|------------| | "basic" | 372866 | | "silver" | 728424 | | "gold" | 7050198 | |------------|------------| 3 rows selected </code></pre></div></div> <p>This three-way join selects from three different data sources in one query:</p> <ul> <li>hive.orders table</li> <li>custview (a view of the HBase customers table)</li> <li>clicks.json file</li> </ul> <p>The join column for both sets of join conditions is the cust_id column. The views workspace is used for this query so that custview can be accessed. The hive.orders table is also visible to the query.</p> <p>However, note that the JSON file is not directly visible from the views workspace, so the query specifies the full path to the file:</p> <div class="language-plaintext highlighter-rouge"><div class="highlight"><pre class="highlight"><code>dfs.`/mapr/demo.mapr.com/data/nested/clicks/clicks.json` </code></pre></div></div> <h2 id="whats-next">What’s Next</h2> <p>Go to <a href="/docs/lesson-3-run-queries-on-complex-data-types">Lesson 3: Run Queries on Complex Data Types</a>.</p> <div class="doc-nav"> <span class="previous-toc"><a href="/docs/lesson-1-learn-about-the-data-set/">← Lesson 1: Learn about the Data Set</a></span><span class="next-toc"><a href="/docs/lesson-3-run-queries-on-complex-data-types/">Lesson 3: Run Queries on Complex Data Types →</a></span> </div> </div> </div> </div> </div> <p class="push"></p> <div id="footer" class="mw"> <div class="wrapper"> Copyright © 2012-2022 The Apache Software Foundation, licensed under the Apache License, Version 2.0.<br> Apache and the Apache feather logo are trademarks of The Apache Software Foundation. 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Lesson 2: Run Queries with ANSI SQL - Apache Drill