select sum(*) from (select count(*) NU from tab1 union select count(*) NU from tab2) temp
本文共 139 字，大约阅读时间需要 1 分钟。
select sum(*) from (select count(*) NU from tab1 union select count(*) NU from tab2) temp
转载于:https://www.cnblogs.com/isuben/p/5403618.html