{"image_url":null,"blog_title":"\u8eca\u8f2a\u306ex\u767a\u660e ~B.G's Blog~","type":"rich","url":"https://bg1.hatenablog.com/entry/2025/07/12/210000","height":"190","author_name":"BG1","version":"1.0","blog_url":"https://bg1.hatenablog.com/","title":"DISTINCT","author_url":"https://blog.hatena.ne.jp/BG1/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbg1.hatenablog.com%2Fentry%2F2025%2F07%2F12%2F210000\" title=\"DISTINCT - \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>","provider_name":"Hatena Blog","published":"2025-07-12 21:00:00","categories":["PostgreSQL"],"description":"\u91cd\u8907\u3092\u53d6\u308a\u9664\u3044\u3066\u4e00\u610f\u306a\u5024\u3060\u3051\u3092\u53d6\u5f97\u3057\u305f\u3044\u6642\u306b\u3001DISTINCT\u3092\u4ed8\u3051\u308b\u30027.3. \u9078\u629e\u30ea\u30b9\u30c8 postgresdb1=# SELECT address FROM profile; address --------- Tokyo Osaka Nagoya Sapporo Fukuoka Tokyo Osaka Kyoto (8 \u884c) postgresdb1=# SELECT DISTINCT address FROM profile; address --------- Sapporo Fukuoka Tokyo Nagoya Osaka Kyoto (6 \u884c) postgresdb1=#'To\u2026","width":"100%","provider_url":"https://hatena.blog"}