[B! sql] shunt_iのブックマーク

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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 (2)</h3> <ul class="centerarticle-sub-navi"> <li> <a href="/shunt_i/sql/DB/" > DB </a> </li> <li> <a href="/shunt_i/sql/%E3%81%82%E3%81%A8%E3%81%A7%E8%AA%AD%E3%82%80/" > あとで読む </a> </li> </ul> <p class="centerarticle-sub-navi-more"> <a href="/shunt_i/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shunt_iのブックマーク (14) </h2> </div> <div > <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="/shunt_i/{{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 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href="/q/%E6%8A%80%E8%A1%93">技術</a>を紹介します。と言っても、『プログラマのための<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>　第2版』の受け売りがほとんどなので、この<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>を読んでいただければ、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>稿を読む必要はありません。最初に、パフォーマンス・チューニングに関する全体の方針を述べておくと、それはボトルネック（一番遅いところ）を改善することです。当たり前ですが、既に十分速い処理をもっと速くしたところで、システム全体のパフォーマンスには影響しません。従って「処理が遅い」と感じたら、最初にすることは、<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a> やアプリの改修ではなく、「どこが遅いのか」を調査することです。いきなりあてずっぽうで改善をはじめても効果は出ません。医者が患者を診るとき最初にすることが検査であるのと同じです。病因が何であるかを突き止めてからでないと、正しい処方はできないのです。その基<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>を承知していただいた</p> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4730831249775141220"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://mickindex.sakura.ne.jp/database/db_optimize.html" 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data-target-url="https://qiita.com/ken1041/items/49417edd50536a397318"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://qiita.com/ken1041/items/49417edd50536a397318" 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%2Fken1041%2Fitems%2F49417edd50536a397318" alt="">ワンランク上のSQLを書くためのポイント3つ - Qiita</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/qiita.com/ken1041/items/49417edd50536a397318" class="js-keyboard-entry-page-openable" title="ワンランク上のSQLを書くためのポイント3つ - Qiita (316ブックマーク)" data-gtm-click-label="user-bookmark-users">316 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fqiita.com%2Fken1041" title="『qiita.com/ken1041』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> qiita.com/ken1041 </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">この記事はNuco Advent Calendar <a data-gtm-click-label="entry-summary-keyword" href="/q/2022">2022</a>の17日目の記事です。ワンランク上の<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>とは？ 1年近く、<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%83%87%E3%83%BC%E3%82%BF%E5%88%86%E6%9E%90">データ分析</a>に関わる業務に携わっってきた中で、良い<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>、いまいちな<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>をいろいろ見てきました。自分が書く<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>も、最初の頃は目も当てられない<a data-gtm-click-label="entry-summary-keyword" href="/q/SQL">SQL</a>も書いてきました。そんな中で、こんなことを意識していくと、より良い<a data-gtm-click-label="entry-summary-keyword" 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alt="ワンランク上のSQLを書くためのポイント3つ - Qiita"> </a> </div> </div> <div class="centerarticle-reaction js-user-bookmark-id-container" id="bookmark-4729602914773394532"> <div class="centerarticle-reaction-comment js-user-bookmark-comment " data-url="https://qiita.com/ken1041/items/49417edd50536a397318" data-user-name="shunt_i"> <a href="/shunt_i/" data-gtm-click-label="user-reaction-usericon" class="centerarticle-reaction-thumb"> <img src="https://cdn.profile-image.st-hatena.com/users/shunt_i/profile.png" alt="shunt_i" title="shunt_i" class="centerarticle-reaction-image"> </a> <div class="centerarticle-reaction-main"> <span class="centerarticle-reaction-username"><a href="https://b.hatena.ne.jp/shunt_i/20221218#bookmark-4729602914773394532" class="js-anchor-path" data-gtm-click-label="user-reaction-username">shunt_i</a></span> <span class="centerarticle-reaction-timestamp">2022/12/18</span> <span class="js-private-icon status is-hidden"><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"></span> <ul class="centerarticle-reaction-tags js-tag-text"> <li><a href="/shunt_i/sql/" data-gtm-click-label="user-reaction-tag">sql</a></li> </ul> </div> <div class="centerarticle-reaction-foot"> <div class="centerarticle-reaction-meta"> <span class="comment-permalink js-comment-permalink"> <a href="/entry/4729602914773394532/comment/shunt_i" 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://zenn.dev/takuho/articles/efc40344f3122e"> <div class="centerarticle-entry is-image-entry-unit"> <h3 class="centerarticle-entry-title"> <a href="https://zenn.dev/takuho/articles/efc40344f3122e" 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%2Fzenn.dev%2Ftakuho%2Farticles%2Fefc40344f3122e" alt="">100秒でMySQLのローカル環境をDockerで作って、データも自動で入れる。最強のSQL練習環境構築法</a> </h3> <ul class="centerarticle-entry-data"> <li> <span class="centerarticle-users"> <a href="/entry/s/zenn.dev/takuho/articles/efc40344f3122e" class="js-keyboard-entry-page-openable" title="100秒でMySQLのローカル環境をDockerで作って、データも自動で入れる。最強のSQL練習環境構築法 (370ブックマーク)" data-gtm-click-label="user-bookmark-users">370 users</a> </span> </li> <li> <a href="/shunt_i/?url=https%3A%2F%2Fzenn.dev%2Ftakuho" title="『zenn.dev/takuho』の新着エントリー" data-gtm-click-label="user-bookmark-domain"> zenn.dev/takuho </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">【<a data-gtm-click-label="entry-summary-keyword" href="/q/2022">2022</a>/2/26 追記】主にはてブコメントで様々なご指摘を頂いたので、タイトルの修正＆内容を一部追記しました。分かりにくいタイトルを付けてしまい申し訳ございません。ご指摘ありがとうございます。もともと<a data-gtm-click-label="entry-summary-keyword" href="/q/%E6%9C%AC">本</a>記事は自分用のメモを兼ねて駆け出し<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>の人が数人参考にしてくれたらいいかな、程度の気持ちで書いたものでした。現在<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%81%AF%E3%81%A6%E3%81%AA">はてな</a>ブックマークの<a data-gtm-click-label="entry-summary-keyword" href="/q/%E3%83%86%E3%82%AF%E3%83%8E%E3%83%AD%E3%82%B8%E3%83%BC">テクノロジー</a>カテゴリーで 1 位になっており、予想の 1000 倍以上の人に見ていただける記事になってしまいました。今後も精進します、ありがとうございます！特に理由もなくローカルに <a data-gtm-click-label="entry-summary-keyword" href="/q/mysql">MySQL</a> を入れて遊びたくなる気持ちって定期的に湧きますよね。私は湧きます、半年に 1 回ぐらい。業務ではフロントを触ることが多く、<a data-gtm-click-label="entry-summary-keyword" href="/q/DB">DB</a> はそれほど触りません。そのため久々に <a data-gtm-click-label="entry-summary-keyword" href="/q/mysql">MySQL</a> をローカルで立ち上げようとするといつも手順を忘れてしまっていて、なん</p> <a href="https://zenn.dev/takuho/articles/efc40344f3122e" class="centerarticle-entry-image" target="_blank" rel="noopener" data-gtm-click-label="user-bookmark-thumb"> <img 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