{"id":92278,"date":"2025-01-10T16:30:39","date_gmt":"2025-01-10T13:00:39","guid":{"rendered":"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/"},"modified":"2025-01-10T16:30:39","modified_gmt":"2025-01-10T13:00:39","slug":"explaining-the-need-for-sqls-common-table-expressions-cte-2gag","status":"publish","type":"post","link":"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/","title":{"rendered":"\u062a\u0648\u0636\u06cc\u062d (\u0646\u06cc\u0627\u0632 \u0628\u0647) \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 SQL (CTE)"},"content":{"rendered":"<div data-article-id=\"2198917\" id=\"article-body\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_84 counter-hierarchy ez-toc-counter-rtl ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u0641\u0647\u0631\u0633\u062a \u0645\u0637\u0627\u0644\u0628<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#%D9%85%D9%88%D8%B1%D8%AF_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87\" >\u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#1_CTE_%DA%86%DB%8C%D8%B3%D8%AA\" >1. CTE \u0686\u06cc\u0633\u062a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#2_%D9%86%D8%AD%D9%88\" >2. \u0646\u062d\u0648<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#3_%D9%85%D9%86%D8%A7%D9%81%D8%B9\" >3. \u0645\u0646\u0627\u0641\u0639<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#%DA%AF%D8%A7%D9%87%DB%8C_%D8%A7%D9%88%D9%82%D8%A7%D8%AA%D8%8C_CTE_%DB%8C%DA%A9_%D8%B6%D8%B1%D9%88%D8%B1%D8%AA_%D8%A7%D8%B3%D8%AA_%E2%80%93_%D9%86%D9%87_%D9%81%D9%82%D8%B7_%DB%8C%DA%A9_%D8%AA%DA%A9%D9%86%DB%8C%DA%A9_%D8%A8%D8%A7%D8%B2%D8%B3%D8%A7%D8%B2%DB%8C\" >\u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a\u060c CTE \u06cc\u06a9 \u0636\u0631\u0648\u0631\u062a \u0627\u0633\u062a &#8211; \u0646\u0647 \u0641\u0642\u0637 \u06cc\u06a9 \u062a\u06a9\u0646\u06cc\u06a9 \u0628\u0627\u0632\u0633\u0627\u0632\u06cc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nabfollower.com\/blog\/explaining-the-need-for-sqls-common-table-expressions-cte-2gag\/#4_%D9%85%D9%86%D8%A7%D8%A8%D8%B9\" >4. \u0645\u0646\u0627\u0628\u0639<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%D9%85%D9%88%D8%B1%D8%AF_%D8%A7%D8%B3%D8%AA%D9%81%D8%A7%D8%AF%D9%87\"><\/span>\n<p>  \u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u0646\u06af\u0631\u0627\u0646\u06cc \u0645\u0633\u062a\u0646\u062f \u06a9\u0631\u062f\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 <strong>\u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u062a\u062f\u0627\u0648\u0644<\/strong> \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0628\u0647 \u0637\u0648\u0631 \u0645\u06a9\u0631\u0631 \u062f\u0631 Redash \u0647\u0646\u06af\u0627\u0645 \u0627\u06cc\u062c\u0627\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \/ \u06af\u0632\u0627\u0631\u0634 \u0647\u0627\u06cc \u0646\u0638\u0627\u0631\u062a\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646\u060c \u0645\u0646 \u0628\u0647 \u062a\u0631\u062a\u06cc\u0628 \u0639\u0645\u0644\u06cc\u0627\u062a SQL \u0628\u0631\u062e\u0648\u0631\u062f \u06a9\u0631\u062f\u0645 \u06a9\u0647 \u06cc\u0627\u062f \u06af\u0631\u0641\u062a\u0645 \u06a9\u0647 \u0634\u0645\u0627 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0645\u0634\u062a\u0642 \u0634\u062f\u0647 \u0631\u0627 \u062f\u0631 \u0647\u0645\u0627\u0646 \u0639\u0628\u0627\u0631\u062a\u06cc \u06a9\u0647 \u062f\u0631 \u0622\u0646 \u062a\u0639\u0631\u06cc\u0641 \u0634\u062f\u0647 \u0627\u0633\u062a \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0646\u06cc\u062f. <\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_CTE_%DA%86%DB%8C%D8%B3%D8%AA\"><\/span>\n<p>  1. CTE \u0686\u06cc\u0633\u062a<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\u06cc\u06a9 CTE (Common Table Expression) \u0627\u0633\u062a <strong>\u0645\u062c\u0645\u0648\u0639\u0647 \u0646\u062a\u0627\u06cc\u062c \u0645\u0648\u0642\u062a<\/strong> <\/li>\n<li>\u0645\u06cc\u200c\u062a\u0648\u0627\u0646\u06cc\u062f \u0628\u0647 \u0639\u0628\u0627\u0631\u062a SELECT\u060c INSERT\u060c UPDATE \u06cc\u0627 DELETE \u062f\u06cc\u06af\u0631\u06cc \u0627\u0631\u062c\u0627\u0639 \u062f\u0647\u06cc\u062f<\/li>\n<li>\u06cc\u0639\u0646\u06cc \u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u0622\u0646 \u0631\u0627 \u0628\u0633\u0627\u0632\u06cc\u062f \u0648 \u062f\u0631 \u067e\u0631\u0633 \u0648 \u062c\u0648\u06cc \u0628\u0639\u062f\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u06a9\u0646\u06cc\u062f<\/li>\n<li>\u062f\u0631 \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc \u067e\u06cc\u0686\u06cc\u062f\u0647 \u062a\u0631 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f<\/li>\n<li>\u0622\u0646\u0647\u0627 \u0647\u0633\u062a\u0646\u062f <strong>\u0639\u0628\u0627\u0631\u0627\u062a<\/strong>\u060c \u06cc\u0639\u0646\u06cc \u0647\u0645\u06cc\u0634\u0647 \u06cc\u06a9 \u0645\u0642\u062f\u0627\u0631 \u0631\u0627 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u0646\u062f<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"2_%D9%86%D8%AD%D9%88\"><\/span>\n<p>  2. \u0646\u062d\u0648<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media2.dev.to\/dynamic\/image\/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto\/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fw0rzyd600ala98vfe6ps.png\" alt=\"\u062a\u0648\u0636\u06cc\u062d\u0627\u062a \u062a\u0635\u0648\u06cc\u0631\" loading=\"lazy\" width=\"736\" height=\"369\" title=\"\"><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/media2.dev.to\/dynamic\/image\/width=800%2Cheight=%2Cfit=scale-down%2Cgravity=auto%2Cformat=auto\/https%3A%2F%2Fdev-to-uploads.s3.amazonaws.com%2Fuploads%2Farticles%2Fl8fc1d73es7dtxk837p2.png\" alt=\"\u062a\u0648\u0636\u06cc\u062d\u0627\u062a \u062a\u0635\u0648\u06cc\u0631\" loading=\"lazy\" width=\"653\" height=\"368\" title=\"\"><\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_%D9%85%D9%86%D8%A7%D9%81%D8%B9\"><\/span>\n<p>  3. \u0645\u0646\u0627\u0641\u0639<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li>\u0622\u0633\u0627\u0646 \u0628\u0631\u0627\u06cc \u06cc\u0627\u062f\u06af\u06cc\u0631\u06cc<\/li>\n<li>\u062e\u0648\u0627\u0646\u0627\u06cc\u06cc \u06a9\u062f<\/li>\n<li>query named \u0627\u0637\u0644\u0627\u0639\u0627\u062a\u06cc \u062f\u0631 \u0645\u0648\u0631\u062f \u0646\u062a\u0627\u06cc\u062c \u067e\u0631\u0633 \u0648 \u062c\u0648 \u0628\u0647 \u0634\u0645\u0627 \u0645\u06cc \u062f\u0647\u062f<\/li>\n<li>SQL \u0642\u0627\u0628\u0644 \u062e\u0648\u0627\u0646\u062f\u0646 \u0628\u0639\u062f \u0627\u0632 2 \u0645\u0627\u0647 \u06a9\u0645\u06a9 \u0628\u0632\u0631\u06af\u06cc \u0628\u0647 \u062f\u06cc\u06af\u0631\u0627\u0646 \u0648 \u0634\u0645\u0627 \u0645\u06cc \u06a9\u0646\u062f<\/li>\n<li>\u0645\u062f\u0648\u0644\u0627\u0631 \u0628\u0648\u062f\u0646<\/li>\n<li>\u0642\u0627\u0628\u0644 \u06a9\u067e\u06cc \u06a9\u0631\u062f\u0646\u060c \u0642\u0627\u0628\u0644 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u062c\u062f\u062f<\/li>\n<li>CTE \u0647\u0627 \u0631\u0627 \u0645\u06cc \u062a\u0648\u0627\u0646 \u0628\u0647 \u0647\u0645 \u0686\u0633\u0628\u0627\u0646\u062f<\/li>\n<li>\u0628\u0627 \u0637\u0631\u0632 \u0641\u06a9\u0631 \u0634\u0645\u0627 \u062f\u0631 \u0645\u0648\u0631\u062f \u062a\u062c\u0632\u06cc\u0647 \u0648 \u062a\u062d\u0644\u06cc\u0644 \u062f\u0627\u062f\u0647 \u0647\u0627 \u0628\u0647\u062a\u0631 \u0645\u0637\u0627\u0628\u0642\u062a \u062f\u0627\u0631\u062f<\/li>\n<li>\u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 (CTE) \u0627\u063a\u0644\u0628 \u0628\u0631\u0627\u06cc \u06a9\u0627\u0647\u0634 \u067e\u06cc\u0686\u06cc\u062f\u06af\u06cc \u067e\u0631\u0633 \u0648 \u062c\u0648\u0647\u0627\u06cc SQL \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f. <\/li>\n<li>\u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a\u060c CTE \u0647\u0627 \u0641\u0642\u0637 \u06cc\u06a9 \u062a\u06a9\u0646\u06cc\u06a9 \u0628\u0627\u0632\u0633\u0627\u0632\u06cc \u0646\u06cc\u0633\u062a\u0646\u062f. \u0627\u06af\u0631 \u0645\u06cc \u062e\u0648\u0627\u0647\u06cc\u062f \u0631\u0648\u06cc \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0645\u0634\u062a\u0642 \u0634\u062f\u0647 \u0641\u06cc\u0644\u062a\u0631 \u06a9\u0646\u06cc\u062f\u060c \u0622\u0646\u0647\u0627 \u0636\u0631\u0648\u0631\u06cc \u0647\u0633\u062a\u0646\u062f.<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%DA%AF%D8%A7%D9%87%DB%8C_%D8%A7%D9%88%D9%82%D8%A7%D8%AA%D8%8C_CTE_%DB%8C%DA%A9_%D8%B6%D8%B1%D9%88%D8%B1%D8%AA_%D8%A7%D8%B3%D8%AA_%E2%80%93_%D9%86%D9%87_%D9%81%D9%82%D8%B7_%DB%8C%DA%A9_%D8%AA%DA%A9%D9%86%DB%8C%DA%A9_%D8%A8%D8%A7%D8%B2%D8%B3%D8%A7%D8%B2%DB%8C\"><\/span>\n<p>  \u06af\u0627\u0647\u06cc \u0627\u0648\u0642\u0627\u062a\u060c CTE \u06cc\u06a9 \u0636\u0631\u0648\u0631\u062a \u0627\u0633\u062a &#8211; \u0646\u0647 \u0641\u0642\u0637 \u06cc\u06a9 \u062a\u06a9\u0646\u06cc\u06a9 \u0628\u0627\u0632\u0633\u0627\u0632\u06cc<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight sql\"><code><span class=\"k\">select<\/span> <span class=\"n\">player_name<\/span><span class=\"p\">,<\/span>\n       <span class=\"nb\">year<\/span><span class=\"p\">,<\/span>\n       <span class=\"k\">case<\/span> <span class=\"k\">when<\/span> <span class=\"nb\">year<\/span> <span class=\"o\">=<\/span><span class=\"s1\">'SR'<\/span> <span class=\"k\">then<\/span> <span class=\"s1\">'yes'<\/span>\n       <span class=\"k\">else<\/span> <span class=\"k\">null<\/span>\n       <span class=\"k\">end<\/span> <span class=\"k\">as<\/span> <span class=\"nv\">\"is_a_senior\"<\/span>\n<span class=\"k\">from<\/span> <span class=\"n\">benn<\/span><span class=\"p\">.<\/span><span class=\"n\">college_football_players<\/span>\n<span class=\"k\">where<\/span> <span class=\"n\">is_a_senior<\/span> <span class=\"o\">=<\/span> <span class=\"nv\">\"yes\"<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<ul>\n<li>\u06a9\u0647 \u06cc\u06a9 \u062e\u0637\u0627 \u0628\u0631\u0645\u06cc \u06af\u0631\u062f\u0627\u0646\u062f <code>column \"is_a_senior\" does not exist<\/code> \u0647\u0646\u06af\u0627\u0645 \u0627\u0631\u062c\u0627\u0639 \u0628\u0647 \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0645\u0634\u062a\u0642 \u0634\u062f\u0647 \u062f\u0631 <code>WHERE<\/code> \u0628\u0646\u062f<\/li>\n<li>\u0628\u0647 \u0627\u06cc\u0646 \u062f\u0644\u06cc\u0644 \u0627\u0633\u062a \u06a9\u0647 \u062a\u0631\u062a\u06cc\u0628 \u067e\u0631\u062f\u0627\u0632\u0634 \u067e\u0631\u0633 \u0648 \u062c\u0648 SQL:\n<ol>\n<li><code>FROM<\/code><\/li>\n<li><code>WHERE<\/code><\/li>\n<li><code>GROUP BY<\/code><\/li>\n<li><code>HAVING<\/code><\/li>\n<li><code>SELECT<\/code><\/li>\n<li><code>ORDER BY<\/code><\/li>\n<li><code>LIMIT\/OFFSET<\/code><\/li>\n<\/ol>\n<\/li>\n<li>\u0631\u0627 <code>WHERE<\/code> \u0628\u0646\u062f \u0642\u0628\u0644 \u0627\u0632 \u0627\u0631\u0632\u06cc\u0627\u0628\u06cc \u0645\u06cc \u0634\u0648\u062f <code>SELECT<\/code> \u0628\u0646\u062f\u060c \u0628\u0627\u0639\u062b \u0627\u06cc\u062c\u0627\u062f \u0646\u0627\u0645 \u0645\u0633\u062a\u0639\u0627\u0631 \u0633\u062a\u0648\u0646 \u0645\u0634\u062a\u0642 \u0634\u062f\u0647 (<code>is_a_senior<\/code>) \u062f\u0631 \u062f\u0633\u062a\u0631\u0633 \u0646\u0628\u0627\u0634\u062f <code>WHERE<\/code> \u0628\u0646\u062f<\/li>\n<li>\u0631\u0627\u0647 \u062d\u0644 \u0633\u0627\u062f\u0647 \u0628\u0627 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u0634\u062a\u0631\u06a9 (CTE) (\u0645\u0645\u06a9\u0646 \u0627\u0633\u062a \u0645\u0648\u0627\u0631\u062f \u062f\u06cc\u06af\u0631\u06cc \u0648\u062c\u0648\u062f \u062f\u0627\u0634\u062a\u0647 \u0628\u0627\u0634\u062f) \u0628\u0647 \u0634\u0631\u062d \u0632\u06cc\u0631 \u0627\u0633\u062a:\n<\/li>\n<\/ul>\n<div class=\"highlight js-code-highlight\">\n<pre class=\"highlight sql\"><code><span class=\"k\">WITH<\/span> <span class=\"n\">player_data<\/span> <span class=\"k\">AS<\/span> <span class=\"p\">(<\/span>\n    <span class=\"k\">SELECT<\/span> <span class=\"n\">player_name<\/span><span class=\"p\">,<\/span>\n           <span class=\"nb\">year<\/span><span class=\"p\">,<\/span>\n           <span class=\"k\">CASE<\/span> <span class=\"k\">WHEN<\/span> <span class=\"nb\">year<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'SR'<\/span> <span class=\"k\">THEN<\/span> <span class=\"s1\">'yes'<\/span>\n                <span class=\"k\">ELSE<\/span> <span class=\"k\">null<\/span>\n           <span class=\"k\">END<\/span> <span class=\"k\">AS<\/span> <span class=\"n\">is_a_senior<\/span>\n    <span class=\"k\">FROM<\/span> <span class=\"n\">benn<\/span><span class=\"p\">.<\/span><span class=\"n\">college_football_players<\/span>\n<span class=\"p\">)<\/span>\n<span class=\"k\">SELECT<\/span> <span class=\"n\">player_name<\/span><span class=\"p\">,<\/span>\n       <span class=\"nb\">year<\/span><span class=\"p\">,<\/span>\n       <span class=\"n\">is_a_senior<\/span>\n<span class=\"k\">FROM<\/span> <span class=\"n\">player_data<\/span>\n<span class=\"k\">WHERE<\/span> <span class=\"n\">is_a_senior<\/span> <span class=\"o\">=<\/span> <span class=\"s1\">'yes'<\/span><span class=\"p\">;<\/span>\n<\/code><\/pre>\n<div class=\"highlight__panel js-actions-panel\">\n<div class=\"highlight__panel-action js-fullscreen-code-action\">\n    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-on\"><title>\u0648\u0627\u0631\u062f \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M16 3h6v6h-2V5h-4V3zM2 3h6v2H4v4H2V3zm18 16v-4h2v6h-6v-2h4zM4 19h4v2H2v-6h2v4z\"\/>\n<\/svg><\/p>\n<p>    <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" class=\"highlight-action crayons-icon highlight-action--fullscreen-off\"><title>\u0627\u0632 \u062d\u0627\u0644\u062a \u062a\u0645\u0627\u0645 \u0635\u0641\u062d\u0647 \u062e\u0627\u0631\u062c \u0634\u0648\u06cc\u062f<\/title>\n    <path d=\"M18 7h4v2h-6V3h2v4zM8 9H2V7h4V3h2v6zm10 8v4h-2v-6h6v2h-4zM8 15v6H6v-4H2v-2h6z\"\/>\n<\/svg><\/p>\n<\/div>\n<\/div>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"4_%D9%85%D9%86%D8%A7%D8%A8%D8%B9\"><\/span>\n<p>  4. \u0645\u0646\u0627\u0628\u0639<br \/>\n<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>https:\/\/mode.com\/sql-tutorial\/sql-case<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u0645\u0648\u0631\u062f \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0646\u06af\u0631\u0627\u0646\u06cc \u0645\u0633\u062a\u0646\u062f \u06a9\u0631\u062f\u0646 \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0627\u0632 \u0639\u0628\u0627\u0631\u0627\u062a \u062c\u062f\u0648\u0644 \u0645\u062a\u062f\u0627\u0648\u0644 \u0647\u0645\u0627\u0646\u0637\u0648\u0631 \u06a9\u0647 \u0628\u0647 \u0637\u0648\u0631 \u0645\u06a9\u0631\u0631 \u062f\u0631 Redash \u0647\u0646\u06af\u0627\u0645 \u0627\u06cc\u062c\u0627\u062f \u067e\u0631\u0633 \u0648 \u062c\u0648 \/ \u06af\u0632\u0627\u0631\u0634 \u0647\u0627\u06cc \u0646\u0638\u0627\u0631\u062a\u06cc \u0627\u0633\u062a\u0641\u0627\u062f\u0647 \u0645\u06cc \u0634\u0648\u062f. \u0647\u0645\u0686\u0646\u06cc\u0646\u060c \u0645\u0646 \u0628\u0647 \u062a\u0631\u062a\u06cc\u0628 \u0639\u0645\u0644\u06cc\u0627\u062a SQL \u0628\u0631\u062e\u0648\u0631\u062f \u06a9\u0631\u062f\u0645 \u06a9\u0647 \u06cc\u0627\u062f \u06af\u0631\u0641\u062a\u0645 \u06a9\u0647 \u0634\u0645\u0627 \u0646\u0645\u06cc \u062a\u0648\u0627\u0646\u06cc\u062f \u06cc\u06a9 \u0633\u062a\u0648\u0646 \u0645\u0634\u062a\u0642 \u0634\u062f\u0647 \u0631\u0627 \u062f\u0631 \u0647\u0645\u0627\u0646 \u0639\u0628\u0627\u0631\u062a\u06cc \u06a9\u0647 \u062f\u0631 \u0622\u0646 &hellip;<\/p>\n","protected":false},"author":2,"featured_media":92280,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"fifu_image_url":"","fifu_image_alt":"","footnotes":""},"categories":[339],"tags":[],"class_list":["post-92278","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-dev"],"_links":{"self":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/92278","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/comments?post=92278"}],"version-history":[{"count":0,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/posts\/92278\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media\/92280"}],"wp:attachment":[{"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/media?parent=92278"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/categories?post=92278"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nabfollower.com\/blog\/wp-json\/wp\/v2\/tags?post=92278"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}