{"provider_name":"Hatena Blog","provider_url":"https://hatena.blog","version":"1.0","author_url":"https://blog.hatena.ne.jp/shase428/","url":"https://shase428.hatenablog.jp/entry/2025/06/17/113025","image_url":null,"html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fshase428.hatenablog.jp%2Fentry%2F2025%2F06%2F17%2F113025\" title=\"MySQL\u306eEnum\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044NotNull \u3060\u3068Enum Index \u306e 1\u756a\u3092\u6697\u9ed9\u7684\u306b\u4f7f\u3046 - \u30d3\u30c3\u30c8\u306e\u6d77\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","height":"190","description":"\u3068\u3001\u30de\u30cb\u30e5\u30a2\u30eb\u306b\u66f8\u3044\u3066\u3042\u308b If an ENUM column is declared to permit NULL, the NULL value is a valid value for the column, and the default value is NULL. If an ENUM column is declared NOT NULL, its default value is the first element of the list of permitted values. ENUM \u5217\u304c NULL \u3092\u8a31\u53ef\u3059\u308b\u3088\u3046\u306b\u5ba3\u8a00\u3055\u308c\u3066\u3044\u308b\u5834\u5408\u3001NULL \u5024\u306f\u5217\u306e\u6709\u52b9\u306a\u5024\u3067\u3042\u308a\u3001\u30c7\u2026","blog_title":"\u30d3\u30c3\u30c8\u306e\u6d77","categories":[],"type":"rich","blog_url":"https://shase428.hatenablog.jp/","published":"2025-06-17 11:30:25","title":"MySQL\u306eEnum\u306f\u3001\u30c7\u30d5\u30a9\u30eb\u30c8\u304c\u8a2d\u5b9a\u3055\u308c\u3066\u3044\u306a\u3044NotNull \u3060\u3068Enum Index \u306e 1\u756a\u3092\u6697\u9ed9\u7684\u306b\u4f7f\u3046","author_name":"shase428","width":"100%"}