SQL count 多表总数求和问题
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解决时间 2021-03-29 22:50
- 提问者网友：
- 2021-03-29 01:52
SQL count 多表总数求和问题
最佳答案
- 五星知识达人网友：独钓一江月
- 2021-03-29 03:26
可以这样写:
select
(select count(*) from bumen)+(select count(*) from mrs) as sum_count
如果两个表结果相同的话,也可以用
select count(*) as sum_count
from
(
select * from A
union all
select * from B
) as tmp
select
(select count(*) from bumen)+(select count(*) from mrs) as sum_count
如果两个表结果相同的话,也可以用
select count(*) as sum_count
from
(
select * from A
union all
select * from B
) as tmp
全部回答
- 1楼网友：酒者煙囻
- 2021-03-29 05:00
select
(select count(*) from bumen)+(select count(*) from mrs) as sum_count
(select count(*) from bumen)+(select count(*) from mrs) as sum_count
- 2楼网友：十年萤火照君眠
- 2021-03-29 04:31
select sum(b.rowcnt)
from sysobjects a join sysindexes b on a.id=b.id and a.xtype='u' and b.indid<2
where a.name in('A','B')
from sysobjects a join sysindexes b on a.id=b.id and a.xtype='u' and b.indid<2
where a.name in('A','B')
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