[B! sql] R2Mのブックマーク

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href="/R2M/%E7%B5%8C%E6%B8%88/" data-gtm-click-label="user-tags"> 経済 <span class="count">(1993)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E7%A4%BE%E4%BC%9A/" data-gtm-click-label="user-tags"> 社会 <span class="count">(1921)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E5%8A%B4%E5%83%8D/" data-gtm-click-label="user-tags"> 労働 <span class="count">(1064)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E5%8C%BB%E7%99%82/" data-gtm-click-label="user-tags"> 医療 <span class="count">(924)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E3%83%8D%E3%82%BF/" data-gtm-click-label="user-tags"> ネタ <span class="count">(890)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E8%A1%8C%E6%94%BF/" data-gtm-click-label="user-tags"> 行政 <span class="count">(838)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E4%B8%AD%E5%9B%BD/" data-gtm-click-label="user-tags"> 中国 <span class="count">(748)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E3%82%B2%E3%83%BC%E3%83%A0/" data-gtm-click-label="user-tags"> ゲーム <span class="count">(653)</span> </a> </li> <li class="js-most-frequent-tag"> <a href="/R2M/%E9%A3%9F/" data-gtm-click-label="user-tags"> 食 <span class="count">(625)</span> </a> </li> </ul> <p class="centerarticle-sub-navi-more"> <button type="button" class="js-display-all-tags" data-gtm-click-label="user-tags-show-all">タグをすべて表示</button> </p> </div> <div class="centerarticle-sidebar-menu"> <h3 class="centerarticle-aside-title">関連タグで絞り込む (23)</h3> <ul class="centerarticle-sub-navi"> <li> <a href="/R2M/sql/azure/" > azure </a> </li> <li> <a href="/R2M/sql/BigQuery/" > BigQuery </a> </li> <li> <a href="/R2M/sql/database/" > database </a> </li> <li> <a href="/R2M/sql/DWH/" > DWH </a> </li> <li> <a href="/R2M/sql/google/" > google </a> </li> <li> <a href="/R2M/sql/GPU/" > GPU </a> </li> <li> <a href="/R2M/sql/Linux/" > Linux </a> </li> <li> <a href="/R2M/sql/orm/" > orm </a> </li> <li> <a href="/R2M/sql/programming/" > programming </a> </li> <li> <a href="/R2M/sql/SQL/" > SQL </a> </li> <li> <a href="/R2M/sql/tool/" > tool </a> </li> <li> <a href="/R2M/sql/TypeScript/" > TypeScript </a> </li> <li> <a href="/R2M/sql/%E3%82%A2%E3%83%B3%E3%83%81%E3%83%91%E3%82%BF%E3%83%BC%E3%83%B3/" > アンチパターン </a> </li> <li> <a href="/R2M/sql/%E3%82%A8%E3%83%87%E3%82%A3%E3%82%BF/" > エディタ </a> </li> <li> <a href="/R2M/sql/%E3%83%81%E3%83%A5%E3%83%BC%E3%83%8B%E3%83%B3%E3%82%B0/" > チューニング </a> </li> <li> <a href="/R2M/sql/%E3%83%87%E3%83%BC%E3%82%BF/" > データ </a> </li> <li> <a href="/R2M/sql/%E3%83%87%E3%83%BC%E3%82%BF%E5%88%86%E6%9E%90/" > データ分析 </a> </li> <li> <a href="/R2M/sql/%E3%83%97%E3%83%AD%E3%82%B0%E3%83%A9%E3%83%9F%E3%83%B3%E3%82%B0/" > プログラミング </a> </li> <li> <a href="/R2M/sql/%E5%AD%A6%E7%BF%92/" > 学習 </a> </li> <li> <a href="/R2M/sql/%E6%9B%B8%E8%A9%95/" > 書評 </a> </li> <li> <a href="/R2M/sql/%E6%A9%9F%E6%A2%B0%E5%AD%A6%E7%BF%92/" > 機械学習 </a> </li> <li> <a href="/R2M/sql/%E8%A8%80%E8%AA%9E/" > 言語 </a> </li> <li> <a href="/R2M/sql/%E8%A8%AD%E8%A8%88/" > 設計 </a> </li> </ul> <p class="centerarticle-sub-navi-more"> <a href="/R2M/bookmark">タグの絞り込みを解除</a> </p> </div> </div> <div class="center-container"> <div class="centerarticle-title-container"> <h2 class="centerarticle-title"> sqlに関するR2Mのブックマーク (36) </h2> </div> <div class="js-user-bookmark-item-autoload-container" data-next-page-path="/R2M/sql/?page=2" data-next-xhr-path="/api/users/R2M/bookmarks?tag=sql&page=2" data-next-label="次のページ" > <script type="text/x-template" id="template-short-url-click"> {{#tweet_url}} <a href="{{tweet_url}}" target="_blank" rel="noopener noreferrer" data-gtm-click-label="reaction-twitter-clicks"><span>{{count}} clicks</span></a> {{/tweet_url}} {{^tweet_url}} <span>{{count}} clicks</span> {{/tweet_url}} </script> <script type="text/x-template" id="template-bookmark-item"> {{^is_wiped}} <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="{{url}}"> <div class="centerarticle-entry {{#has_image}}is-image-entry-unit{{/has_image}}"> <h3 class="centerarticle-entry-title"> <a href="{{url}}" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="{{favicon_url}}" alt="">{{title}}</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="{{page_url}}" class="js-keyboard-entry-page-openable" title="{{title}} ({{total_bookmarks}}ブックマーク)" data-gtm-click-label="user-bookmark-users">{{total_bookmarks_with_user_postfix}}</a> </span> </li> <li> <a href="/R2M/{{url_query}}" title="『{{root_title}}』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> {{root_title}} </a> </li> {{#is_categorized}} <li><a href="{{category_path}}" data-gtm-click-label="user-bookmark-category">{{category_title}}</a></li> {{/is_categorized}} </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">{{{summary_with_keyword_links}}}</p> {{#has_image}} <a href="{{canonical_url}}" class="centerarticle-entry-image" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-thumb"> <img src="{{image_url}}" alt="{{title}}"> </a> {{/has_image}} </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-{{location_id}}"> <div class="centerarticle-reaction-comment js-user-bookmark-comment {{badge_icon}}" data-url="{{url}}" data-user-name="{{author_name}}"> <a href="{{top_page_path}}" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="{{profile_icon_url}}" alt="{{author_name}}" title="{{author_name}}" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="{{anchor_url}}" class="js-anchor-path" data-gtm-click-label="user-reaction-username">{{author_name}}</a></span> <span class="centerarticle-reaction-timestamp">{{created}}</span> <span class="js-private-icon status {{#is_public}}is-hidden{{/is_public}}"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">{{{comment_expanded}}}</span> <ul class="centerarticle-reaction-tags js-tag-text"> {{#tags}} <li><a href="/{{author_name}}/{{escaped_label}}/" data-gtm-click-label="user-reaction-tag">{{label}}</a></li> {{/tags}} </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="{{#is_bookmark}}comment-permalink{{/is_bookmark}}{{^is_bookmark}}original-permalink{{/is_bookmark}} js-comment-permalink"> <a href="{{comment_page_path}}" data-gtm-click-label="user-reaction-permalink" rel="{{#should_nofollow}}nofollow{{/should_nofollow}}">{{#is_bookmark}}リスト{{/is_bookmark}}{{^is_bookmark}}リンク{{/is_bookmark}}</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> </div> <ul class="centerarticle-reaction-following js-user-following-bookmarks-icon"> {{#following_bookmarks}} <li> <a href="{{anchor_url}}" class="following-bookmark-link" data-gtm-click-label="user-bookmark-following-bookmarker-icon"> <img src="{{profile_icon_url}}" alt="{{author_name}}" class="following-bookmark-icon" > </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{author_name}}</span><span class="following-bookmark-timestamp">{{created}}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags"> {{ #tags }}<li>{{ label }}</li>{{ /tags }} </ul> </span> </span> </li> {{/following_bookmarks}} {{#following_bookmarks.length}} <li class="centerarticle-reaction-following-more"><button type="button" class="js-show-all-following-bookmarks" data-gtm-click-label="user-bookmark-showall-following-bookmarks">すべて表示</button></li> {{/following_bookmarks.length}} </ul> <div class="js-user-following-bookmarks-detail is-hidden"> {{#following_bookmarks}} <div class="centerarticle-reaction-comment js-user-bookmark-comment {{badge_icon}}" data-url="{{url}}" data-user-name="{{author_name}}"> <a href="{{top_page_path}}" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="{{profile_icon_url}}" alt="{{author_name}}" title="{{author_name}}" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="{{anchor_url}}" class="js-anchor-path" data-gtm-click-label="user-reaction-username">{{author_name}}</a></span> <span class="centerarticle-reaction-timestamp">{{created}}</span> <span class="js-private-icon status {{#is_public}}is-hidden{{/is_public}}"><img src="/images/v4/public/userpage/icon-private.svg" alt="非公開" width="10px" height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment">{{{comment_expanded}}}</span> <ul class="centerarticle-reaction-tags js-tag-text"> {{#tags}} <li><a href="/{{author_name}}/{{escaped_label}}/" data-gtm-click-label="user-reaction-tag">{{label}}</a></li> {{/tags}} </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="{{#is_bookmark}}comment-permalink{{/is_bookmark}}{{^is_bookmark}}original-permalink{{/is_bookmark}} js-comment-permalink"> <a href="{{comment_page_path}}" data-gtm-click-label="user-reaction-permalink" rel="{{#should_nofollow}}nofollow{{/should_nofollow}}">{{#is_bookmark}}リスト{{/is_bookmark}}{{^is_bookmark}}リンク{{/is_bookmark}}</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> {{/following_bookmarks}} </div> </li> {{/is_wiped}} </script> <script type="text/x-template" id="template-following-bookmarker-icon"> <li> <a href="{{anchor_url}}" class="following-bookmark-link" data-gtm-click-label="user-bookmark-following-bookmarker-icon"> <img src="{{profile_icon_url}}" alt="{{author_name}}" class="following-bookmark-icon" > </a> <span class="following-bookmark-popup"> <span class="following-bookmark-username">{{author_name}}</span><span class="following-bookmark-timestamp">{{created}}</span> <span class="following-bookmark-text"> {{ #comment }}<span class="following-bookmark-comment">{{ comment }}</span>{{ /comment }} <ul class="following-bookmark-tags"> {{ #tags }}<li>{{ label }}</li>{{ /tags }} </ul> </span> </span> </li> </script> <script type="text/x-template" id="template-bookmark-item-editor"> <div class="centerarticle-entry {{#has_image}}is-image-entry-unit{{/has_image}}"> <h3 class="centerarticle-entry-title"> <a href="{{url}}" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener{{#noreferrer}} noreferrer{{/noreferrer}}" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="{{favicon_url}}" alt="">{{title}}</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="{{page_url}}" class="js-keyboard-entry-page-openable" title="{{title}} ({{total_bookmarks}}ブックマーク)" data-gtm-click-label="user-bookmark-users">{{total_bookmarks_with_user_postfix}}</a> </span> </li> <li> <a href="/R2M/{{url_query}}" 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height="10px"></span> <div class="centerarticle-reaction-main-comment-tags"> <span class="js-comment"></span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a href="/R2M/sql/" data-gtm-click-label="user-reaction-tag">sql</a></li> <li><a href="/R2M/TypeScript/" data-gtm-click-label="user-reaction-tag">TypeScript</a></li> </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="comment-permalink js-comment-permalink"> <a href="/entry/4746908351091867919/comment/R2M" data-gtm-click-label="user-reaction-permalink" rel="nofollow">リンク</a> </span> <span class="list-star-container js-list-star-container"></span> <span class="twitter-click js-short-url-clicks"></span> </div> <ul class="centerarticle-reaction-menu"> <li class="js-add-star-container add-star-container"></li> </ul> </div> </div> </div> </div> <ul class="centerarticle-reaction-following js-user-following-bookmarks-icon"> </ul> <div class="js-user-following-bookmarks-detail is-hidden"> </div> </li> <li class="bookmark-item js-user-bookmark-item js-intent-share-bookmark" data-target-url="https://qiita.com/zackey2/items/883616dff71e51bf6563"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://qiita.com/zackey2/items/883616dff71e51bf6563" class="js-clickable-link js-keyboard-openable" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-title"><img class="centerarticle-entry-favicon" src="https://cdn-ak2.favicon.st-hatena.com/64?url=https%3A%2F%2Fqiita.com%2Fzackey2%2Fitems%2F883616dff71e51bf6563" alt="">リーダブルSQL[より良いSQLを書くためのシンプルで実践的なテクニック] - Qiita</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/qiita.com/zackey2/items/883616dff71e51bf6563" class="js-keyboard-entry-page-openable" title="リーダブルSQL[より良いSQLを書くためのシンプルで実践的なテクニック] - Qiita (350ブックマーク)" data-gtm-click-label="user-bookmark-users">350 users</a> </span> </li> <li> <a href="/R2M/?url=https%3A%2F%2Fqiita.com%2Fzackey2" title="『qiita.com/zackey2』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> qiita.com/zackey2 </a> </li> <li><a href="/hotentry/it" data-gtm-click-label="user-bookmark-category">テクノロジー</a></li> </ul> <div class="centerarticle-entry-contents"> <p class="centerarticle-entry-summary">はじめに最近<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%82%A8%E3%83%B3%E3%82%B8%E3%83%8B%E3%82%A2">エンジニア</a>界隈では「<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%83%AA%E3%83%BC%E3%83%80%E3%83%96%E3%83%AB%E3%82%B3%E3%83%BC%E3%83%89">リーダブルコード</a>」が話題なっていますね。 <a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%83%AA%E3%83%BC%E3%83%80%E3%83%96%E3%83%AB%E3%82%B3%E3%83%BC%E3%83%89">リーダブルコード</a>では、このような定理が紹介されています。「コードは他の人が最短時間で理解できるように書かなければいけない。」 Dustin Boswell <a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%83%AA%E3%83%BC%E3%83%80%E3%83%96%E3%83%AB%E3%82%B3%E3%83%BC%E3%83%89">リーダブルコード</a> P.3 より引用 <a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>でも同じことが言えそうです。リーダブルな<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>を書いてないと<a data-gtm-click-label="entry-summary-keyword" href="/q/%E7%B5%90%E5%A9%9A">結婚</a>できない時代が今まさに到来しようとしています。皆さん、クソ<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>1を読んだことがありますね？クソ<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>を書いたことがありますね？僕は、あります。そこで、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>記事ではどうしたらリーダブルな<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>が書けるかというアイデアを紹介します。処理の流れの順に上から読めるようにする人間のメンタルモデルは、問題やタスクを小さなステップに分割し、それぞれを順番に実行することに適しています。サブクエリを使った<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>では、処理の流れは上から下ではなく、ネストされた</p> <a href="https://qiita.com/zackey2/items/883616dff71e51bf6563" 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