Question

我有一个查询，该查询返回几个雇员ID，查询如下所示

select E.EmpID as EmployeeID
from tblEmployee E
where EmpRole in (1,2,3) and E.Test like '%PS%'

我还有另一个查询，看起来像下面的

Select E.EmpID and EmployeeID, B.CountryId, B.CountryName, B.StateId, 
B.StateName
from tblEmployeeInfo E
inner join tblTest B
where E.StateId = B.StateId and E.CountryId = B.CountryId

我的要求是第二个查询只需要返回那些导致第一个查询的员工的数据...

两者都是不同的表，如何将它们都加入？

Answer 1

在IN子句中使用Select

Select E.EmpID as EmployeeID, B.CountryId, B.CountryName, B.StateId, 
B.StateName
from tblEmployeeInfo E
inner join tblTest B
where E.StateId = B.StateId and E.CountryId = B.CountryId
and E.EmpID IN (select E.EmpID
    from tblEmployee E
    where EmpRole in (1,2,3) and E.Test like '%PS%'
)

Answer 2

您可以在tblEmployee中进行另一个JOIN：

Select E.EmpID and EmployeeID, B.CountryId, B.CountryName, B.StateId, 
B.StateName
from tblEmployeeInfo E
JOIN tblTest B ON E.StateId = B.StateId and E.CountryId = B.CountryId
JOIN tblEmployee E2 ON E.EmpID = E2.EmpID AND E2.EmpRole in (1,2,3) AND E2.Test like '%PS%'

SQL Server-使用依赖于另一个查询的查询来过滤数据

2 个答案: