{"title":"MySQL\u3084PostgreSQL\u306b\u304a\u3051\u308bNULL\u306f\u3001\u4e0d\u660e\u306a\u5024\u3067\u3042\u308a\u8a08\u7b97\u306b\u4f7f\u3046\u3068\u7d50\u679c\u304cNULL\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308b","categories":["\u30c6\u30af\u30ce\u30ed\u30b8\u30fc"],"url":"https://www.konosumi.net/entry/2020/02/02/234006","description":"\u79c1\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u8a00\u8a9e\u306b\u304a\u3051\u308bNULL\u306f\u3001\u300c\u4f55\u3082\u306a\u3044\u5024\u300d\u307e\u305f\u306f\u300c\u4f55\u3082\u793a\u3057\u3066\u3044\u306a\u3044\u5024\u300d\u3068\u3044\u3046\u5b9a\u7fa9\u3067\u7406\u89e3\u3057\u3066\u3044\u307e\u3059\u3002 \u3068\u3053\u308d\u304cSQL\u306b\u304a\u3051\u308bNULL\u3067\u306f\u3001\u3053\u306e\u5358\u7d14\u306a\u7406\u89e3\u304c\u901a\u7528\u3057\u306a\u3044\u3053\u3068\u3092\u77e5\u308a\u307e\u3057\u305f\u3002 \u5148\u306b\u7d50\u8ad6\u3092\u8a00\u3063\u3066\u3057\u307e\u3046\u3068\u3001\u300cNULL\u3068\u306f\u4e0d\u660e\u306a\u5024\u306e\u3053\u3068\u3067\u3042\u308b\u300d\u3068\u3044\u3046\u89e3\u91c8\u3067\u843d\u3061\u7740\u3044\u305f\u306e\u3067\u3059\u304c\u3002 \u3053\u308c\u306e\u4f55\u304c\u554f\u984c\u306a\u306e\u304b\u3001\u89e3\u8aac\u3057\u307e\u3059\u3002 MySQL\u306b\u304a\u3051\u308bNULL\u3068\u306f\u3001\u300c\u5b58\u5728\u3057\u306a\u3044\u4e0d\u660e\u306a\u5024\u300d\u306e\u3053\u3068\u3067\u3042\u308b MySQL\u306e\u30ea\u30d5\u30a1\u30ec\u30f3\u30b9\u3092\u8aad\u3080\u3068\u3001NULL\u3068\u306f\u4e0d\u660e\u306a\u5024\u3067\u3042\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002 NULL\u5024\u306b\u6163\u308c\u308b\u307e\u3067\u306f\u9a5a\u304f\u304b\u3082\u3057\u308c\u307e\u305b\u3093\u3002 \u6982\u5ff5\u7684\u306b\u306f\u3001NULL\u306f\u300c\u5b58\u5728\u3057\u306a\u3044\u4e0d\u660e\u306a\u5024\u300d\u3092\u610f\u5473\u3057\u3001\u307b\u304b\u306e\u5024\u3068\u306f\u591a\u5c11\u7570\u306a\u308b\u65b9\u2026","published":"2020-02-02 23:40:06","provider_name":"Hatena Blog","author_url":"https://blog.hatena.ne.jp/konosumi/","blog_url":"https://www.konosumi.net/","image_url":null,"provider_url":"https://hatena.blog","blog_title":"konosumi note","version":"1.0","author_name":"konosumi","height":"190","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.konosumi.net%2Fentry%2F2020%2F02%2F02%2F234006\" title=\"MySQL\u3084PostgreSQL\u306b\u304a\u3051\u308bNULL\u306f\u3001\u4e0d\u660e\u306a\u5024\u3067\u3042\u308a\u8a08\u7b97\u306b\u4f7f\u3046\u3068\u7d50\u679c\u304cNULL\u306b\u306a\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u304c\u3042\u308b - konosumi note\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","width":"100%"}