我可以在TSQL中使用WITH两次来过滤像我的例子那样的结果集吗？

我需要做这样的事情,但SQL Server 2008不喜欢它.我的查询实际上比这更复杂,我意识到这不是完成我正在做的事情的最好方法,但我的重点是WITH语句的功能而不是select和where语句.

WITH stuff1 AS(从名为startdate> 0的员工中选择名称,startdate,id)

WITH stuff2 AS(从stuff1中选择名称,startdate,id)

select*from stuff2,其中id> 10

Cade Roux.. 30

我一直这样做:

WITH stuff1 AS (
    SELECT name
           ,startdate
           ,id
    FROM employees
    WHERE startdate > 0
)
,stuff2 AS (
    SELECT name
           ,startdate
           ,id
    FROM stuff1
)
SELECT *
FROM stuff2
WHERE id > 10

据我所知,我没有达到CTE的限制.

你唯一不能做的事情(这将是非常有用的)是在单独的SELECTs中重用CTE :

WITH stuff1 AS (
    SELECT name
           ,startdate
           ,id
    FROM employees
    WHERE startdate > 0
)
,stuff2 AS (
    SELECT name
           ,startdate
           ,id
    FROM stuff1
)
SELECT *
FROM stuff2
WHERE id > 10
;
SELECT *
FROM stuff2
WHERE id < 10

说.相反,您必须再次复制并粘贴整个CTE链.

我一直这样做:

WITH stuff1 AS (
    SELECT name
           ,startdate
           ,id
    FROM employees
    WHERE startdate > 0
)
,stuff2 AS (
    SELECT name
           ,startdate
           ,id
    FROM stuff1
)
SELECT *
FROM stuff2
WHERE id > 10

据我所知,我没有达到CTE的限制.

你唯一不能做的事情(这将是非常有用的)是在单独的SELECTs中重用CTE :

WITH stuff1 AS (
    SELECT name
           ,startdate
           ,id
    FROM employees
    WHERE startdate > 0
)
,stuff2 AS (
    SELECT name
           ,startdate
           ,id
    FROM stuff1
)
SELECT *
FROM stuff2
WHERE id > 10
;
SELECT *
FROM stuff2
WHERE id < 10

说.相反,您必须再次复制并粘贴整个CTE链.