SQL:从多个表中组合选择计数(*) [英] SQL: Combine Select count(*) from multiple tables

问题描述

如何将不同表中的多个 select count(*) 合并为一个 return?

How do you combine multiple select count(*) from different table into one return?

我有一个类似的情况 post

但我想要一个回报.

我尝试了 Union all，但它吐出 3 个单独的计数行.你如何将它们合二为一?

I tried Union all but it spit back 3 separate rows of count. How do you combine them into one?

select count(*) from foo1 where ID = '00123244552000258'
union all 
select count(*) from foo2 where ID = '00123244552000258'
union all
select count(*) from foo3 where ID = '00123244552000258'

我使用的是 MS SQL 2005

edit: I'm on MS SQL 2005

推荐答案

SELECT 
(select count(*) from foo1 where ID = '00123244552000258')
+
(select count(*) from foo2 where ID = '00123244552000258')
+
(select count(*) from foo3 where ID = '00123244552000258')

这是一个简单的方法.

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