{"provider_url":"https://hatena.blog","title":"Teng\u3067NULL\u3092\u30bb\u30c3\u30c8\u3057\u305f\u304b\u3063\u305f","categories":["Perl"],"author_name":"dameninngenn_owata","provider_name":"Hatena Blog","url":"https://blog.dameninngenn.com/entry/2012/12/11/032221","version":"1.0","image_url":null,"published":"2012-12-11 03:22:21","blog_url":"https://blog.dameninngenn.com/","author_url":"https://blog.hatena.ne.jp/dameninngenn_owata/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.dameninngenn.com%2Fentry%2F2012%2F12%2F11%2F032221\" title=\"Teng\u3067NULL\u3092\u30bb\u30c3\u30c8\u3057\u305f\u304b\u3063\u305f - \u30c0\u30e1\u4eba\u9593\u30aa\u30f3\u30e9\u30a4\u30f3\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","description":"UPDATE table_name SET hoge = NULL WHERE id = 100; \u307f\u305f\u3044\u306bNULL\u3092\u5165\u308c\u305f\u3044\u6642Teng\u3067\u3084\u308b\u306b\u306f $teng->update('table_name', { hoge => undef, },{ id => 100, }); \u306e\u3088\u3046\u306bundef\u3067\u3044\u3051\u308b\u3002\u8ffd\u3063\u3066\u307f\u305f\u3089undef\u306fundef\u306e\u307e\u307eSQL\u5b9f\u884c\u3059\u308b\u524d\u306e\u3068\u3053\u307e\u3067\u6e21\u3063\u3066\u304d\u3066\u3066\u3001DBI\u306equote()\u3067undef\u304cNULL\u306b\u306a\u3063\u3066\u3063\u3066\u611f\u3058\u3060\u3063\u305f\u3002 NULL Values Undefined values, or undef, are used to indicate NULL values.\u2026","width":"100%","type":"rich","height":"190","blog_title":"\u30c0\u30e1\u4eba\u9593\u30aa\u30f3\u30e9\u30a4\u30f3"}