sql – 关键字’with’附近的语法错误.

Microsoft SQL Server 2008 R2 (RTM) - 10.50.1617.0 (X64)   Apr 22 2011 19:23:43
Copyright (c) Microsoft Corporation  Express Edition with Advanced Services (64-bit) on
Windows NT 6.1 <X64> (Build 7601: Service Pack 1)

这是我的功能：

GO
ALTER FUNCTION [dbo].[GetRoot] 
(
    @Param1 int 
)
RETURNS varchar(50)
AS
BEGIN
DECLARE @ReturnValue varchar(50)
with results as
    (
        select parentouid,net_ouid from net_ou where net_ouid=@Param1
        union all
        select t2.parentouid,t2.net_ouid from net_ou t2 
        inner join results t1 on t1.parentouid = t2.net_ouid where t2.parentouid <> t1.net_ouid
    )   
    select @ReturnValue = net_ou.displayname 
    from  NET_OU RIGHT OUTER JOIN
    results ON net_ou.net_ouid = results.ParentouID where results.parentouid=results.net_ouid

    RETURN @ReturnValue

END

解决方法

;with results as
    (
        select parentouid,t2.net_ouid from net_ou t2 
        inner join results t1 on t1.parentouid = t2.net_ouid where t2.parentouid <> t1.net_ouid
    )

给this article一个阅读,以了解为什么你需要这样做. Snipit：

However,if the CTE is not the first statement in the batch,you must
precede the WITH keyword with a semicolon. As a best practice,I
prefer to prefix all of my CTEs with a semicolon—I find this
consistent approach easier than having to remember whether I need a
semicolon or not.

就个人而言,我不会为每个CTE做这件事,但如果这样使得事情变得更容易,那就不会伤害任何东西.

（编辑：李大同）

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