shigemk2 https://blog.hatena.ne.jp/shigemk2/ by shigemk2 https://www.shigemk2.com/ Presto 今更。UNIONはカラムのデータ型を見てUNIONしているので、カラム名は見ていない。 これはうごく。 SELECT 1 AS "aaa", '2' AS "bbb" UNION ALL SELECT 1 AS "aaa", '2' AS "ccc" これはエラーになる。 SELECT 1 AS "aaa", '2' AS "bbb" UNION ALL SELECT 1 AS "aaa", 3 AS "ccc" 8.26. SELECT — Presto 0.215 Documentation 190 <iframe src="https://hatenablog-parts.com/embed?url=https%3A%2F%2Fwww.shigemk2.com%2Fentry%2F2019%2F01%2F15%2F214442" title="Presto UNION ALL - 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> Hatena Blog https://hatena.blog 2019-01-15 21:44:42 rich https://www.shigemk2.com/entry/2019/01/15/214442 1.0 100%