{"published":"2025-11-04 14:48:29","categories":["AWS","Redshift"],"provider_name":"Hatena Blog","type":"rich","blog_url":"https://yohei-a.hatenablog.jp/","title":"Redshift \u306e COPY \u30b3\u30de\u30f3\u30c9\u306b\u304a\u3051\u308b Null \u306e\u6271\u3044","image_url":null,"author_url":"https://blog.hatena.ne.jp/yohei-a/","author_name":"yohei-a","version":"1.0","blog_title":"ablog","description":"EMPTYASNULL Amazon Redshift \u3067 CHAR \u3068 VARCHAR \u306e\u7a7a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u3092 NULL \u3068\u3057\u3066\u30ed\u30fc\u30c9\u3059\u308b\u3053\u3068\u3092\u6307\u5b9a\u3057\u307e\u3059\u3002INT \u306a\u3069\u3001\u4ed6\u306e\u30c7\u30fc\u30bf\u578b\u306e\u7a7a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306f\u5e38\u306b NULL \u3067\u30ed\u30fc\u30c9\u3055\u308c\u307e\u3059\u3002\u30c7\u30fc\u30bf\u306b 2 \u3064\u306e\u533a\u5207\u308a\u8a18\u53f7\u304c\u9023\u7d9a\u3057\u3001\u533a\u5207\u308a\u8a18\u53f7\u306e\u9593\u306b\u6587\u5b57\u304c\u306a\u3044\u5834\u5408\u3001\u7a7a\u306e\u30d5\u30a3\u30fc\u30eb\u30c9\u306b\u306a\u308a\u307e\u3059\u3002EMPTYASNULL \u3068 NULL AS '' (\u7a7a\u306e\u6587\u5b57\u5217) \u306f\u540c\u3058\u52d5\u4f5c\u3092\u751f\u6210\u3057\u307e\u3059\u3002\uff08\u4e2d\u7565\uff09 NULL AS 'null_string' null_string \u306b\u4e00\u81f4\u3059\u308b\u30d5\u30a3\u30fc\u30eb\u30c9\u3092 NULL \u3068\u3057\u3066\u30ed\u30fc\u30c9\u3057\u307e\u3059\u3002\u3053\u3053\u3067 null_string \u306f\u4efb\u610f\u306e\u6587\u5b57\u5217\u3067\u3059\u2026","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fyohei-a.hatenablog.jp%2Fentry%2F20251104%2F1762235309\" title=\"Redshift \u306e COPY \u30b3\u30de\u30f3\u30c9\u306b\u304a\u3051\u308b Null \u306e\u6271\u3044 - ablog\" 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%","provider_url":"https://hatena.blog","height":"190","url":"https://yohei-a.hatenablog.jp/entry/20251104/1762235309"}