{"categories":["PostgreSQL"],"blog_url":"https://bg1.hatenablog.com/","image_url":null,"author_url":"https://blog.hatena.ne.jp/BG1/","provider_url":"https://hatena.blog","author_name":"BG1","published":"2025-07-20 21:00:00","title":"GROUP BY","blog_title":"\u8eca\u8f2a\u306ex\u767a\u660e ~B.G's Blog~","height":"190","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbg1.hatenablog.com%2Fentry%2F2025%2F07%2F20%2F210000\" title=\"GROUP BY - \u8eca\u8f2a\u306ex\u767a\u660e ~B.G&#39;s Blog~\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","version":"1.0","type":"rich","provider_name":"Hatena Blog","width":"100%","description":"GROUP BY\u3067\u3001\u30b0\u30eb\u30fc\u30d7\u5316\u3059\u308b\u30027.2. \u30c6\u30fc\u30d6\u30eb\u5f0f postgresdb1=# SELECT * FROM profile; name | address | age --------+---------+----- Taro | Tokyo | 30 Jiro | Osaka | 28 Saburo | Nagoya | 26 Shiro | Sapporo | 26 Goro | Fukuoka | 26 Sato | Tokyo | 33 Ito | Osaka | 31 Sasaki | Kyoto | 29 (8 \u884c) postgresdb1=# SELECT address,\u2026","url":"https://bg1.hatenablog.com/entry/2025/07/20/210000"}