{"categories":["[programming]"],"provider_url":"https://hatena.blog","height":"190","blog_title":"Enjoy*Study","url":"https://blog.enjoyxstudy.com/entry/20120619/p1","author_name":"onozaty","width":"100%","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/onozaty/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.enjoyxstudy.com%2Fentry%2F20120619%2Fp1\" title=\"IS NOT DISTINCT FROM - Enjoy*Study\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","title":"IS NOT DISTINCT FROM","description":"\u5165\u529b\u306e\u3069\u3061\u3089\u304b\u304c\u771f\u307e\u305f\u306f\u507d\u3067\u306f\u306a\u304fNULL\u306e\u5834\u5408\u3001\u901a\u5e38\u306e\u6bd4\u8f03\u6f14\u7b97\u5b50\u306f\uff08\"\u4e0d\u660e\"\u3092\u610f\u5473\u3059\u308b\uff09null\u3092\u751f\u6210\u3057\u307e\u3059\u3002\u4f8b\u3048\u30707 = NULL\u306fnull\u306b\u306a\u308a\u307e\u3059\u3002\u3053\u306e\u52d5\u4f5c\u304c\u9069\u5207\u3067\u306a\u3044\u5834\u5408\u306f\u3001IS [ NOT ] DISTINCT FROM\u69cb\u6587\u3092\u4f7f\u7528\u3057\u3066\u304f\u3060\u3055\u3044\u3002 expression IS DISTINCT FROM expression expression IS NOT DISTINCT FROM expression \u975eNULL\u306e\u5165\u529b\u3067\u306f\u3001IS DISTINCT FROM\u306f<>\u6f14\u7b97\u5b50\u3068\u540c\u3058\u3067\u3059\u3002 \u3057\u304b\u3057\u3001\u5165\u529b\u304c\u3069\u3061\u3089\u3082NULL\u306e\u5834\u5408\u3001\u3053\u308c\u306f\u507d\u3092\u8fd4\u3057\u3001\u7247\u65b9\u306e\u5165\u529b\u306e\u307f\u304cNULL\u306e\u5834\u5408\u306f\u771f\u3092\u8fd4\u3057\u307e\u3059\u2026","version":"1.0","type":"rich","published":"2012-06-19 00:00:00","image_url":null,"blog_url":"https://blog.enjoyxstudy.com/"}