Question

嘿，我是SQL新手，以下内容不起作用。基本上语法是正确的

SELECT Hometeam, count(*) 
FROM [dbo].[E0$] 
GROUP BY Hometeam 
HAVING COUNT(*) >3

但是当我计算结果时，它会失败。

SELECT count(*) 
FROM (SELECT Hometeam, count(*) 
FROM [dbo].[E0$] 
GROUP BY Hometeam 
HAVING COUNT(*) >3)

Msg 102，Level 15，State 1，Line 75 ＆＃39;）＆＃39;附近的语法不正确。

Answer 1

子查询本身及其中的列都需要别名。

SELECT count(*) 
FROM (
  SELECT Hometeam, count(*) as cnt
  FROM [dbo].[E0$] 
  GROUP BY Hometeam 
  HAVING COUNT(*) >3
) x

Answer 2

你必须把一些东西放在Count方法中。

例如：

Select count(1)...