这两句 SQL 能否合并成一句？

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select max(id) from A
select max(id) from B
返回这两句结果最大的一个数（即 A 与 B 表最大的 id ）

1 replies • 1970-01-01 08:00:00 +08:00

maikcn

Apr 12, 2014

SELECT max(id) FROM (
SELECT max(id) as id FROM A
UNION ALL
SELECT max(id) as id FROM B
) AS c;