34,590
社区成员
发帖
与我相关
我的任务
分享
insert into d
select (select sum(用户数) from a),(select sum(...) from b),(select sum(,,,) from c)
seelct sum(a) a ,sum(b) b ,sum(c) c
from (
select sum(a) a,0 b,0 c from table1
union all select 0,sum(b),0 from table2
union all select 0,0,sum(c) from table3
)f