Question

我想使用像这样的查询

SELECT personId
FROM Person p 
Inner Join address a on p.personId=a.personId
WHERE(a.created > GETDATE() -10)

我想使用此数据来过滤此查询

SELECT * 
FROM accounts a
WHERE a.person /*is in the results of the previous query */

我该怎么做？

Answer 1

这应该可以解决问题（假设你的帐户表中有列personId）。

SELECT * 
FROM accounts a
WHERE a.personId in (
                SELECT DISTINCT personId
                FROM Person p 
                Inner Join address a on p.personId=a.personId
                WHERE(a.created > DATEADD(d,-10,GETDATE())))

或者，您可以直接加入3个表，而不是使用子查询：

SELECT
    C.*
FROM
    accounts C
INNER JOIN
    Person P ON P.personId = C.personId
INNER JOIN
    [Address] A ON A.personId = P.PersonId
WHERE
    A.created > DATEADD(d,-10,GETDATE())

Answer 2

SQL Server 2008中的一个很好的功能是公用表表达式（CTE）。它基本上是一个内联视图，使实际返回数据的查询更加清晰。

WITH people
AS
(
SELECT personId
FROM Person p 
Inner Join address a on p.personId=a.personId
WHERE(a.created > GETDATE() -10)
)

SELECT * 
FROM accounts a
INNER JOIN people p ON a.personId = p.personId

Answer 3

你可以这样做：

SELECT * 
FROM accounts a
WHERE a.person IN 
(
SELECT personId
FROM Person p 
Inner Join address a on p.personId=a.personId
WHERE(a.created > GETDATE() -10)
);

Answer 4

begin
with Results AS
(
SELECT *
FROM Person p 
Inner Join address a on p.personId=a.personId
WHERE(a.created > GETDATE() -10)
)
END

SELECT * 
FROM accounts a
WHERE a.person IN (select person from Results )

使用先前查询的数据

4 个答案: