{"id":112595,"date":"2024-03-22T20:13:05","date_gmt":"2024-03-22T11:13:05","guid":{"rendered":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%ae%e5%88%97%e3%81%ae%e5%80%a4%e3%82%92%e5%88%97%e5%90%8d%e3%81%ab%e5%a4%89%e6%8f%9b%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/"},"modified":"2024-03-27T11:18:07","modified_gmt":"2024-03-27T02:18:07","slug":"mysql%e3%81%ae%e5%88%97%e3%81%ae%e5%80%a4%e3%82%92%e5%88%97%e5%90%8d%e3%81%ab%e5%a4%89%e6%8f%9b%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/www.silicloud.com\/ja\/blog\/mysql%e3%81%ae%e5%88%97%e3%81%ae%e5%80%a4%e3%82%92%e5%88%97%e5%90%8d%e3%81%ab%e5%a4%89%e6%8f%9b%e3%81%99%e3%82%8b%e6%96%b9%e6%b3%95\/","title":{"rendered":"mysql\u306e\u5217\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5"},"content":{"rendered":"<p>MySQL\u3067\u306f\u52d5\u7684SQL\u3084PIVOT\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u5217\u5024\u3092\u884c\u540d\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e21\u65b9\u306e\u65b9\u6cd5\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002<\/p>\n<ol>\n<li>\u52d5\u7684 SQL \u3092\u4f7f\u7528\u3057\u3066<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SET<\/span> <span class=\"hljs-variable\">@sql<\/span> <span class=\"hljs-operator\">=<\/span> <span class=\"hljs-keyword\">NULL<\/span>;\r\n<span class=\"hljs-keyword\">SELECT<\/span>\r\n  GROUP_CONCAT(<span class=\"hljs-keyword\">DISTINCT<\/span>\r\n    CONCAT(\r\n      <span class=\"hljs-string\">'MAX(IF(column_name = '''<\/span>,\r\n      column_name,\r\n      <span class=\"hljs-string\">''', column_value, NULL)) AS '<\/span>,\r\n      column_name\r\n    )\r\n  ) <span class=\"hljs-keyword\">INTO<\/span> <span class=\"hljs-variable\">@sql<\/span>\r\n<span class=\"hljs-keyword\">FROM<\/span> your_table;\r\n\r\n<span class=\"hljs-keyword\">SET<\/span> <span class=\"hljs-variable\">@sql<\/span> <span class=\"hljs-operator\">=<\/span> CONCAT(<span class=\"hljs-string\">'SELECT id, '<\/span>, <span class=\"hljs-variable\">@sql<\/span>, <span class=\"hljs-string\">' FROM your_table GROUP BY id'<\/span>);\r\n\r\n<span class=\"hljs-keyword\">PREPARE<\/span> stmt <span class=\"hljs-keyword\">FROM<\/span> <span class=\"hljs-variable\">@sql<\/span>;\r\n<span class=\"hljs-keyword\">EXECUTE<\/span> stmt;\r\n<span class=\"hljs-keyword\">DEALLOCATE<\/span> <span class=\"hljs-keyword\">PREPARE<\/span> stmt;\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001id\u3001column_name\u3001column_value\u5217\u3092\u542b\u3080your_table\u30c6\u30fc\u30d6\u30eb\u3092\u6301\u3063\u3066\u3044\u308b\u3068\u3057\u307e\u3059\u3002\u52d5\u7684\u306b\u751f\u6210\u3055\u308c\u305fSQL\u6587\u3092\u7528\u610f\u3057\u3066\u5b9f\u884c\u3059\u308b\u3053\u3068\u3067\u3001column_name\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3067\u304d\u307e\u3059\u3002<\/p>\n<ol>\n<li>PIVOT \u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066<\/li>\n<\/ol>\n<pre class=\"post-pre\"><code><span class=\"hljs-keyword\">SELECT<\/span> <span class=\"hljs-operator\">*<\/span>\r\n<span class=\"hljs-keyword\">FROM<\/span>\r\n(\r\n  <span class=\"hljs-keyword\">SELECT<\/span> id, column_name, column_value\r\n  <span class=\"hljs-keyword\">FROM<\/span> your_table\r\n) src\r\nPIVOT\r\n(\r\n  <span class=\"hljs-built_in\">MAX<\/span>(column_value)\r\n  <span class=\"hljs-keyword\">FOR<\/span> column_name <span class=\"hljs-keyword\">IN<\/span> ([column1], [column2], [column3])\r\n) piv;\r\n<\/code><\/pre>\n<p>\u4e0a\u8a18\u306e\u4f8b\u3067\u306f\u3001column_name \u3067\u767a\u751f\u3059\u308b\u53ef\u80fd\u6027\u306e\u3042\u308b\u5024\u3092\u3042\u3089\u304b\u3058\u3081\u628a\u63e1\u3057\u3066\u304a\u304f\u5fc5\u8981\u304c\u3042\u308a\u3001\u624b\u52d5\u3067\u305d\u308c\u3089\u5024\u3092\u30ea\u30b9\u30c8\u30a2\u30c3\u30d7\u3057\u307e\u3059\u3002\u305d\u3057\u3066\u3001PIVOT \u95a2\u6570\u3092\u4f7f\u3063\u3066\u3001\u3053\u308c\u3089\u306e\u5217\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3057\u307e\u3059\u3002\u5b9f\u969b\u306e\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u3001\u5217\u540d\u306e\u30ea\u30b9\u30c8\u3092\u4fee\u6b63\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>MySQL\u3067\u306f\u52d5\u7684SQL\u3084PIVOT\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u5217\u5024\u3092\u884c\u540d\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e21\u65b9\u306e\u65b9\u6cd5\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 \u52d5\u7684 SQL \u3092\u4f7f\u7528\u3057\u3066 SET @sql = NULL; SELECT GROUP_CONCAT(DISTI [&hellip;]<\/p>\n","protected":false},"author":12,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-112595","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v21.5 (Yoast SEO v21.5) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>mysql\u306e\u5217\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5 - Blog - Silicon Cloud<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.silicloud.com\/ja\/blog\/mysql\u306e\u5217\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"mysql\u306e\u5217\u306e\u5024\u3092\u5217\u540d\u306b\u5909\u63db\u3059\u308b\u65b9\u6cd5\" \/>\n<meta property=\"og:description\" content=\"MySQL\u3067\u306f\u52d5\u7684SQL\u3084PIVOT\u95a2\u6570\u3092\u4f7f\u7528\u3057\u3066\u5217\u5024\u3092\u884c\u540d\u306b\u5909\u66f4\u3067\u304d\u307e\u3059\u3002\u4ee5\u4e0b\u306b\u4e21\u65b9\u306e\u65b9\u6cd5\u306e\u4f8b\u3092\u793a\u3057\u307e\u3059\u3002 \u52d5\u7684 SQL \u3092\u4f7f\u7528\u3057\u3066 SET @sql = NULL; 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