{"type":"rich","provider_name":"Hatena Blog","version":"1.0","description":"\u3053\u306e\u8a18\u4e8b\u3067\u5206\u304b\u308b\u3053\u3068 - '' \u306f\u300c\u7a7a\u3063\u307d\u3068\u3044\u3046\u5024\u300d\u3001NULL \u306f\u300c\u5024\u304c\u306a\u3044\u3053\u3068\u300d\u3002DB\u3067\u306f\u5b8c\u5168\u306b\u5225\u7269 - Go\u306e string \u306f nil \u3092\u6301\u3066\u306a\u3044\u306e\u3067\u3001\u300c\u5024\u304c\u306a\u3044\u300d\u3092\u8868\u73fe\u3067\u304d\u306a\u3044 - \u300c\u672a\u8a2d\u5b9a\u300d\u3092\u578b\u3067\u8868\u3059\u306a\u3089 *string \u304b sql.NullString \u306f\u3058\u3081\u306b \u3053\u3046\u3044\u3046\u72b6\u6cc1\u306b\u51fa\u4f1a\u3063\u305f\u3053\u3068\u306f\u3042\u308a\u307e\u305b\u3093\u304b\u3002 \u300c\u3053\u306e\u30ab\u30e9\u30e0\u3001\u7a7a\u306e\u306f\u305a\u306a\u306e\u306b IS NULL \u3067\u691c\u7d22\u3057\u3066\u3082\u51fa\u3066\u3053\u306a\u3044\u300d\u3002 SELECT id FROM tasks WHERE memo IS NULL; -- 0\u4ef6 SELECT id FROM tasks WHERE memo = ''; -- \u3053\u3063\u3061\u306b\u3044\u305f \u72af\u4eba\u306f\u305f\u3044\u3066\u3044\u3001\u2026","title":"\u7a7a\u6587\u5b57\u3068 NULL \u306f\u4f55\u304c\u9055\u3046\u306e\u304b\u3002Go \u306e string \u306f nil \u306b\u306a\u308c\u306a\u3044","author_url":"https://blog.hatena.ne.jp/chamotarooo/","url":"https://chamotaro.hatenablog.com/entry/tech/go-nil-empty-null","published":"2026-10-25 10:09:01","image_url":null,"width":"100%","blog_title":"chamotarooo\u306e\u30d6\u30ed\u30b0","provider_url":"https://hatena.blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fchamotaro.hatenablog.com%2Fentry%2Ftech%2Fgo-nil-empty-null\" title=\"\u7a7a\u6587\u5b57\u3068 NULL \u306f\u4f55\u304c\u9055\u3046\u306e\u304b\u3002Go \u306e string \u306f nil \u306b\u306a\u308c\u306a\u3044 - chamotarooo\u306e\u30d6\u30ed\u30b0\" 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","blog_url":"https://chamotaro.hatenablog.com/","author_name":"chamotarooo","categories":["\u6280\u8853"]}