我有两个表,我计算它们的行数。例如;
Select count(*) FROM tbl_Events
Select count(*) FROM tbl_Events2
我需要总计数。如何用一条语句对结果求和?
最佳答案
select sum(cnt) from (
select count(*) as cnt from tbl_events
union all
select count(*) as cnt from tbl_events2
) as x
关于mysql - 如何在 Mysql 中计算 Count(*) 的总和,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/6792431/