{"published":"2017-06-29 21:28:30","author_name":"momijiame","provider_name":"Hatena Blog","type":"rich","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fblog.amedama.jp%2Fentry%2F2017%2F06%2F29%2F212830\" title=\"SQL: COALESCE() \u95a2\u6570\u3067 NULL \u3092\u5225\u306e\u5024\u306b\u7f6e\u304d\u63db\u3048\u308b - CUBE SUGAR CONTAINER\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","categories":["macOS","MariaDB","SQL"],"url":"https://blog.amedama.jp/entry/2017/06/29/212830","version":"1.0","height":"190","blog_url":"https://blog.amedama.jp/","provider_url":"https://hatena.blog","width":"100%","author_url":"https://blog.hatena.ne.jp/momijiame/","description":"RDB \u306e\u30b9\u30ad\u30fc\u30de\u8a2d\u8a08\u306b\u304a\u3044\u3066\u3001\u306a\u308b\u3079\u304f\u306a\u3089 Nullable \u306a\u30ab\u30e9\u30e0\u306f\u7121\u3044\u65b9\u304c\u826f\u3044\u3051\u3069\u3001\u305d\u3046\u3082\u3044\u304b\u306a\u3044\u3068\u304d\u304c\u3042\u308b\u3002 \u305d\u3093\u306a\u3068\u304d\u306f COALESCE() \u95a2\u6570\u3092\u4f7f\u3046\u3068 NULL \u306b\u306a\u3063\u3066\u3044\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092\u5225\u306e\u5024\u306b\u7f6e\u63db\u3067\u304d\u308b\u3002 \u3053\u308c\u306f\u3001\u7279\u5b9a\u306e\u5024\u3092 NULL \u306b\u7f6e\u63db\u3067\u304d\u308b NULLIF() \u95a2\u6570\u3068\u5bfe\u306b\u306a\u308b\u3082\u306e\u304b\u306a\u3002 blog.amedama.jp \u52d5\u4f5c\u78ba\u8a8d\u306b\u4f7f\u3063\u305f\u74b0\u5883\u306f\u6b21\u306e\u901a\u308a\u3002 $ sw_vers ProductName: Mac OS X ProductVersion: 10.12.5 BuildVersion: 16F73 $ mysql --version mysql Ver 15.1 D\u2026","image_url":"https://images-fe.ssl-images-amazon.com/images/I/61kzm62vzeL._SL160_.jpg","title":"SQL: COALESCE() \u95a2\u6570\u3067 NULL \u3092\u5225\u306e\u5024\u306b\u7f6e\u304d\u63db\u3048\u308b","blog_title":"CUBE SUGAR CONTAINER"}