{"blog_title":"Oboe\u5439\u304d\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u9ed9\u793a\u9332","width":"100%","published":"2024-04-12 22:32:52","provider_name":"Hatena Blog","title":"GROUP_CONCAT \u304b\u3089CSV\u306b\u3059\u308b\u3002","author_url":"https://blog.hatena.ne.jp/posturan/","height":"190","image_url":null,"description":"MySQL \u306e GROUP_CONCAT \u3042\u308b\u3044\u306f\u3001PostgreSQL \u306e STRING_AGG \u304b\u3089\u3001CSV\uff11\u884c\u3092\u4f5c\u308b\u3002 \u4f5c\u3063\u3066SELECT\u3057\u305f\u6587\u5b57\u5217\u306f\u3001\u5148\u65e5\u66f8\u3044\u305f\u539f\u59cb\u7684\u306a\u30e1\u30bd\u30c3\u30c9 CSV\u5f62\u5f0f\u306e\uff11\u884c\u5206\u306e\u6587\u5b57\u5217\u304b\u3089List<String>\u3078\u306e\u5909\u63db - Oboe\u5439\u304d\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u9ed9\u793a\u9332 \u3092\u4f7f\u3063\u3066\u3001List<String> \u3092\u53d6\u5f97\u3059\u308b\u3002\u4efb\u610f\u306e\u5217\u3067\u3001GROUP BY \u3057\u3066\u3001GROUP_CONCAT \uff0f STRING_AGG \u3067 join \u3059\u308b\u6642\u306b RFC4180 \u6e96\u62e0\u3001\u30ab\u30f3\u30de\u533a\u5207\u308a\u3001\u30c0\u30d6\u30eb\u30af\u30a9\u30fc\u30c6\u30fc\u30b7\u30e7\u30f3\u62ec\u308a\u306b\u3059\u308b\u3002MySQL \u306e\u5834\u5408\u3001\u3001\u3001\u5bfe\u8c61\u5217\u304c\u3001NOT NULL\u5236\u7d04\u304c\u3042\u308b\u5834\u5408\u3001 CONCAT('\u2026","version":"1.0","categories":["SQL"],"provider_url":"https://hatena.blog","type":"rich","blog_url":"https://oboe2uran.hatenablog.com/","author_name":"posturan","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Foboe2uran.hatenablog.com%2Fentry%2F2024%2F04%2F12%2F223252\" title=\"GROUP_CONCAT \u304b\u3089CSV\u306b\u3059\u308b\u3002 - Oboe\u5439\u304d\u30d7\u30ed\u30b0\u30e9\u30de\u306e\u9ed9\u793a\u9332\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://oboe2uran.hatenablog.com/entry/2024/04/12/223252"}