{"height":"190","author_url":"https://blog.hatena.ne.jp/a4dosanddos/","image_url":null,"url":"https://a4dosanddos.hatenablog.com/entry/2017/10/09/172447","author_name":"a4dosanddos","blog_title":"\u30d7\u30ed\u30b0\u30e9\u30e0\u65e5\u8a18","title":"\u30c7\u30fc\u30bf\u306e\u5b58\u5728\u6709\u7121\u3092\u78ba\u304b\u3081\u3066INSERT\u3059\u308b","categories":["PostgreSQL"],"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fa4dosanddos.hatenablog.com%2Fentry%2F2017%2F10%2F09%2F172447\" title=\"\u30c7\u30fc\u30bf\u306e\u5b58\u5728\u6709\u7121\u3092\u78ba\u304b\u3081\u3066INSERT\u3059\u308b - \u30d7\u30ed\u30b0\u30e9\u30e0\u65e5\u8a18\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","published":"2017-10-09 17:24:47","type":"rich","provider_name":"Hatena Blog","provider_url":"https://hatena.blog","width":"100%","version":"1.0","blog_url":"https://a4dosanddos.hatenablog.com/","description":"PostgreSQL \u3067\u300c\u5bfe\u8c61\u306e\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3057\u306a\u3044\u5834\u5408\u306e\u307fINSERT\u3059\u308b\uff08\u65e2\u306b\u30c7\u30fc\u30bf\u304c\u5b58\u5728\u3059\u308b\u5834\u5408\u306bINSERT\u3057\u306a\u3044\uff09\u300dSQL\u306e\u30e1\u30e2\u3002 BEGIN; INSERT INTO test.t1 (id, name) SELECT 1, 'aaa' WHERE NOT EXISTS (SELECT id FROM test.t1 WHERE id = 1); COMMIT; \u4e0a\u8a18\u306e\u3088\u3046\u306b NOT EXISTS \u3092\u4f7f\u3048\u3070\u7c21\u5358\u306b\u3067\u304d\u308b\u3088\u3046\u3067\u3059\u3002SQL \u306f\u65ad\u7247\u7684\u306a\u77e5\u8b58\u3057\u304b\u306a\u3044\u305b\u3044\u3067\u3044\u3064\u3082\u7c21\u5358\u306a\u3053\u3068\u3067\u3082\u82e6\u52b4\u3057\u307e\u3059\u30fb\u30fb\u30fb\u52c9\u5f37\u3057\u306a\u3044\u3068\u3044\u3051\u307e\u305b\u3093\u306d\u3002"}