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Available in 21 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-21" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">21 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%B5%D9%81_(%D9%82%D9%88%D8%A7%D8%B9%D8%AF_%D8%A7%D9%84%D8%A8%D9%8A%D8%A7%D9%86%D8%A7%D8%AA)" title="صف (قواعد البيانات) – Arabic" lang="ar" hreflang="ar" data-title="صف (قواعد البيانات)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Registre_(inform%C3%A0tica)" title="Registre (informàtica) – Catalan" lang="ca" hreflang="ca" data-title="Registre (informàtica)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/%C5%98%C3%A1dek_(datab%C3%A1ze)" title="Řádek (databáze) – Czech" lang="cs" hreflang="cs" data-title="Řádek (databáze)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Datensatz" title="Datensatz – German" lang="de" hreflang="de" data-title="Datensatz" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Kirje" title="Kirje – Estonian" lang="et" hreflang="et" data-title="Kirje" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target"><span>Eesti</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Registro_(base_de_datos)" title="Registro (base de datos) – Spanish" lang="es" hreflang="es" data-title="Registro (base de datos)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Erregistro" title="Erregistro – Basque" lang="eu" hreflang="eu" data-title="Erregistro" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target"><span>Euskara</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B1%D8%AF%DB%8C%D9%81_(%D9%BE%D8%A7%DB%8C%DA%AF%D8%A7%D9%87_%D8%AF%D8%A7%D8%AF%D9%87)" title="ردیف (پایگاه داده) – Persian" lang="fa" hreflang="fa" data-title="ردیف (پایگاه داده)" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Enregistrement_(base_de_donn%C3%A9es)" title="Enregistrement (base de données) – French" lang="fr" hreflang="fr" data-title="Enregistrement (base de données)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%EB%A1%9C%EC%9A%B0_(%EB%8D%B0%EC%9D%B4%ED%84%B0%EB%B2%A0%EC%9D%B4%EC%8A%A4)" title="로우 (데이터베이스) – Korean" lang="ko" hreflang="ko" data-title="로우 (데이터베이스)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Baris_(pangkalan_data)" title="Baris (pangkalan data) – Indonesian" lang="id" hreflang="id" data-title="Baris (pangkalan data)" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target"><span>Bahasa Indonesia</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Record_(database)" title="Record (database) – Italian" lang="it" hreflang="it" data-title="Record (database)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%A8%D7%A9%D7%95%D7%9E%D7%94_(%D7%90%D7%97%D7%A1%D7%95%D7%9F_%D7%A0%D7%AA%D7%95%D7%A0%D7%99%D7%9D)" title="רשומה (אחסון נתונים) – Hebrew" lang="he" hreflang="he" data-title="רשומה (אחסון נתונים)" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Rij_(database)" title="Rij (database) – Dutch" lang="nl" hreflang="nl" data-title="Rij (database)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E7%B5%84_(%E3%83%87%E3%83%BC%E3%82%BF%E3%83%99%E3%83%BC%E3%82%B9)" title="組 (データベース) – Japanese" lang="ja" hreflang="ja" data-title="組 (データベース)" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Rekord_(informatyka)" title="Rekord (informatyka) – Polish" lang="pl" hreflang="pl" data-title="Rekord (informatyka)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Registro_(banco_de_dados)" title="Registro (banco de dados) – Portuguese" lang="pt" hreflang="pt" data-title="Registro (banco de dados)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A1%D1%82%D1%80%D0%BE%D0%BA%D0%B0_(%D0%B1%D0%B0%D0%B7%D0%B0_%D0%B4%D0%B0%D0%BD%D0%BD%D1%8B%D1%85)" title="Строка (база данных) – Russian" lang="ru" hreflang="ru" data-title="Строка (база данных)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A0%D1%8F%D0%B4%D0%BE%D0%BA_(%D0%B1%D0%B0%D0%B7%D0%B8_%D0%B4%D0%B0%D0%BD%D0%B8%D1%85)" title="Рядок (бази даних) – Ukrainian" lang="uk" hreflang="uk" data-title="Рядок (бази даних)" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E5%88%97_(%E6%95%B8%E6%93%9A%E5%BA%AB)" title="列 (數據庫) – Cantonese" lang="yue" hreflang="yue" data-title="列 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class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Record in a relational database table</div> <style data-mw-deduplicate="TemplateStyles:r1251242444">.mw-parser-output .ambox{border:1px solid #a2a9b1;border-left:10px solid #36c;background-color:#fbfbfb;box-sizing:border-box}.mw-parser-output .ambox+link+.ambox,.mw-parser-output .ambox+link+style+.ambox,.mw-parser-output .ambox+link+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+style+.ambox,.mw-parser-output .ambox+.mw-empty-elt+link+link+.ambox{margin-top:-1px}html body.mediawiki .mw-parser-output .ambox.mbox-small-left{margin:4px 1em 4px 0;overflow:hidden;width:238px;border-collapse:collapse;font-size:88%;line-height:1.25em}.mw-parser-output .ambox-speedy{border-left:10px solid #b32424;background-color:#fee7e6}.mw-parser-output .ambox-delete{border-left:10px solid #b32424}.mw-parser-output .ambox-content{border-left:10px solid #f28500}.mw-parser-output .ambox-style{border-left:10px solid #fc3}.mw-parser-output .ambox-move{border-left:10px solid #9932cc}.mw-parser-output .ambox-protection{border-left:10px solid #a2a9b1}.mw-parser-output .ambox .mbox-text{border:none;padding:0.25em 0.5em;width:100%}.mw-parser-output .ambox .mbox-image{border:none;padding:2px 0 2px 0.5em;text-align:center}.mw-parser-output .ambox .mbox-imageright{border:none;padding:2px 0.5em 2px 0;text-align:center}.mw-parser-output .ambox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .ambox .mbox-image-div{width:52px}@media(min-width:720px){.mw-parser-output .ambox{margin:0 10%}}@media print{body.ns-0 .mw-parser-output .ambox{display:none!important}}</style><table class="box-One_source plainlinks metadata ambox ambox-content ambox-one_source" role="presentation"><tbody><tr><td class="mbox-image"><div class="mbox-image-div"><span typeof="mw:File"><a href="/wiki/File:Question_book-new.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/50px-Question_book-new.svg.png" decoding="async" width="50" height="39" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/75px-Question_book-new.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/99/Question_book-new.svg/100px-Question_book-new.svg.png 2x" data-file-width="512" data-file-height="399" /></a></span></div></td><td class="mbox-text"><div class="mbox-text-span">This article <b>relies largely or entirely on a <a href="/wiki/Wikipedia:Articles_with_a_single_source" title="Wikipedia:Articles with a single source">single source</a></b>.<span class="hide-when-compact"> Relevant discussion may be found on the <a href="/wiki/Talk:Row_(database)##" title="Talk:Row (database)">talk page</a>. Please help <a class="external text" href="https://en.wikipedia.org/w/index.php?title=Row_(database)&action=edit">improve this article</a> by <a href="/wiki/Help:Referencing_for_beginners" title="Help:Referencing for beginners">introducing citations to additional sources</a>.<br /><small><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Row%22+database">"Row" database</a> – <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Row%22+database+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?&q=%22Row%22+database&tbs=bkt:s&tbm=bks">newspapers</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Row%22+database+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Row%22+database">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Row%22+database&acc=on&wc=on">JSTOR</a></span></small></span> <span class="date-container"><i>(<span class="date">April 2020</span>)</i></span></div></td></tr></tbody></table> <p>In a <a href="/wiki/Relational_database" title="Relational database">relational database</a>, a <b>row</b>, a.k.a. <a href="/wiki/Record_(computer_science)" title="Record (computer science)">record</a> or <a href="/wiki/Tuple" title="Tuple">tuple</a>, represents a single, implicitly structured <a href="/wiki/Data" title="Data">data</a> item in a <a href="/wiki/Table_(database)" title="Table (database)">table</a>. A database table can be thought of as consisting of rows and <a href="/wiki/Column_(database)" title="Column (database)">columns</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Each row in a table represents a set of related data, and every row in the table has the same structure. </p><p>For example, in a table that represents companies, each row might represent a single company. Columns might represent things like company name, address, etc. In a table that represents <i>the association</i> of employees with departments, each row would associate one employee with one department. </p><p>The implicit structure of a row, and the meaning of the data values in a row, requires that the row be understood as providing a succession of data values, one in each column of the table. The row is then interpreted as a <a href="/wiki/Relvar" title="Relvar">relvar</a> composed of a set of tuples, with each tuple consisting of the two items: the name of the relevant column and the value this row provides for that column. </p><p>Each column expects a data value of a particular <a href="/wiki/Datatype" class="mw-redirect" title="Datatype">type</a>. For example, one column might require a unique <a href="/wiki/Identifier" title="Identifier">identifier</a>, another might require text representing a person's name, another might require an integer representing hourly pay in <a href="/wiki/Dollar" title="Dollar">dollars</a>. </p> <table class="wikitable"> <tbody><tr> <th style="background: #EEE; color:black; vertical-align: middle; text-align: center;" class="table-cast"><span style="display: none">Does not appear</span></th> <th>Column 1</th> <th>Column 2 </th></tr> <tr> <th>Row 1 </th> <td>Row 1, Column 1</td> <td>Row 1, Column 2 </td></tr> <tr> <th>Row 2 </th> <td>Row 2, Column 1</td> <td>Row 2, Column 2 </td></tr> <tr> <th>Row 3 </th> <td>Row 3, Column 1</td> <td>Row 3, Column 2 </td></tr> </tbody></table> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Row_(database)&action=edit&section=1" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</a></b></span> <span class="reference-text"><a rel="nofollow" class="external text" href="http://www.techopedia.com/definition/4425/database-row">"What is a database row?"</a> Cory Janssen, Techopedia, retrieved 27 June 2014</span> </li> </ol></div></div> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl 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.navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Databases" title="Template:Databases"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Databases" title="Template talk:Databases"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Databases" title="Special:EditPage/Template:Databases"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Database_management_systems" style="font-size:114%;margin:0 4em"><a href="/wiki/Database" title="Database">Database management systems</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%">Types</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Object_database" title="Object database">Object-oriented</a> <ul><li><a href="/wiki/Comparison_of_object_database_management_systems" title="Comparison of object database management systems">comparison</a></li></ul></li> <li><a href="/wiki/Relational_database" title="Relational database">Relational</a> <ul><li><a href="/wiki/List_of_relational_database_management_systems" title="List of relational database management systems">list</a></li> <li><a href="/wiki/Comparison_of_relational_database_management_systems" title="Comparison of relational database management systems">comparison</a></li></ul></li> <li><a href="/wiki/Key%E2%80%93value_database" title="Key–value database">Key–value</a></li> <li><a href="/wiki/Column-oriented_DBMS" class="mw-redirect" title="Column-oriented DBMS">Column-oriented</a> <ul><li><a href="/wiki/List_of_column-oriented_DBMSes" title="List of column-oriented DBMSes">list</a></li></ul></li> <li><a href="/wiki/Document-oriented_database" title="Document-oriented database">Document-oriented</a></li> <li><a href="/wiki/Wide-column_store" title="Wide-column store">Wide-column store</a></li> <li><a href="/wiki/Graph_database" title="Graph database">Graph</a></li> <li><a href="/wiki/NoSQL" title="NoSQL">NoSQL</a></li> <li><a href="/wiki/NewSQL" title="NewSQL">NewSQL</a></li> <li><a href="/wiki/In-memory_database" title="In-memory database">In-memory</a> <ul><li><a href="/wiki/List_of_in-memory_databases" title="List of in-memory databases">list</a></li></ul></li> <li><a href="/wiki/Multi-model_database" title="Multi-model database">Multi-model</a> <ul><li><a href="/wiki/Comparison_of_multi-model_databases" title="Comparison of multi-model databases">comparison</a></li></ul></li> <li><a href="/wiki/Cloud_database" title="Cloud database">Cloud</a></li> <li><a href="/wiki/Blockchain-based_database" title="Blockchain-based database">Blockchain-based database</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Concepts</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Database" title="Database">Database</a></li> <li><a href="/wiki/ACID" title="ACID">ACID</a></li> <li><a href="/wiki/Armstrong%27s_axioms" title="Armstrong's axioms">Armstrong's axioms</a></li> <li><a href="/wiki/Codd%27s_12_rules" title="Codd's 12 rules">Codd's 12 rules</a></li> <li><a href="/wiki/CAP_theorem" title="CAP theorem">CAP theorem</a></li> <li><a href="/wiki/Create,_read,_update_and_delete" title="Create, read, update and delete">CRUD</a></li> <li><a href="/wiki/Null_(SQL)" title="Null (SQL)">Null</a></li> <li><a href="/wiki/Candidate_key" title="Candidate key">Candidate key</a></li> <li><a href="/wiki/Foreign_key" title="Foreign key">Foreign key</a></li> <li><a href="/wiki/PACELC_theorem" title="PACELC theorem">PACELC theorem</a></li> <li><a href="/wiki/Superkey" title="Superkey">Superkey</a></li> <li><a href="/wiki/Surrogate_key" title="Surrogate key">Surrogate key</a></li> <li><a href="/wiki/Unique_key" title="Unique key">Unique key</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Objects</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Relation_(database)" title="Relation (database)">Relation</a> <ul><li><a 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navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Concurrency_control" title="Concurrency control">Concurrency control</a></li> <li><a href="/wiki/Data_dictionary" title="Data dictionary">Data dictionary</a></li> <li><a href="/wiki/Java_Database_Connectivity" title="Java Database Connectivity">JDBC</a></li> <li><a href="/wiki/XQuery_API_for_Java" title="XQuery API for Java">XQJ</a></li> <li><a href="/wiki/Open_Database_Connectivity" title="Open Database Connectivity">ODBC</a></li> <li><a href="/wiki/Query_language" title="Query language">Query language</a></li> <li><a href="/wiki/Query_optimization" title="Query optimization">Query optimizer</a></li> <li><a href="/wiki/Query_Rewriting" class="mw-redirect" title="Query Rewriting">Query rewriting system</a></li> <li><a href="/wiki/Query_plan" title="Query plan">Query plan</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Functions</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Database_administration" title="Database administration">Administration</a></li> <li><a href="/wiki/Query_optimization" title="Query optimization">Query optimization</a></li> <li><a href="/wiki/Replication_(computing)#DATABASE" title="Replication (computing)">Replication</a></li> <li><a href="/wiki/Shard_(database_architecture)" title="Shard (database architecture)">Sharding</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related topics</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Database_model" title="Database model">Database models</a></li> <li><a href="/wiki/Database_normalization" title="Database normalization">Database normalization</a></li> <li><a href="/wiki/Database_storage_structures" title="Database 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