{"title":"coalesce presto","provider_name":"Hatena Blog","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F2017%2F09%2F30%2Fcoalesce_presto\" title=\"coalesce presto - by shigemk2\" 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","type":"rich","url":"https://www.shigemk2.com/entry/2017/09/30/coalesce_presto","blog_title":"by shigemk2","published":"2017-09-30 00:13:45","author_name":"shigemk2","blog_url":"https://www.shigemk2.com/","width":"100%","image_url":null,"provider_url":"https://hatena.blog","version":"1.0","description":"COALESCE Returns the first non-null value in the argument list. Like a CASE expression, arguments are only evaluated if necessary. \u7b2c1\u5f15\u6570\u304cnull\u3060\u3063\u305f\u3089\u7b2c2\u5f15\u6570\u3092\u3001\u7b2c2\u5f15\u6570\u304cnull\u3060\u3063\u305f\u3089\u7b2c3\u5f15\u6570\u3092\u8fd4\u3059\u2026\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3001\u7b2cn\u5f15\u6570\u3082null\u3060\u3063\u305f\u3089null\u3092\u8fd4\u3059\u3002 https://prestodb.io/docs/current/functions/conditional.html","categories":["presto"],"author_url":"https://blog.hatena.ne.jp/shigemk2/"}