參考文件：http://blog.csdn.net/jianxin160/article/details/7166379
結合項目修改如下：
表結構：
CREATE TABLE [dbo].[UserRelation](
[UserRelationId] [int] IDENTITY(1,1) NOT NULL,
[UserId] [bigint] NOT NULL,
[LeaderId] [bigint] NOT NULL,
CONSTRAINT [PK_UserRelation] PRIMARY KEY CLUSTERED
函數定義：
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
CREATE FUNCTION GetTeamMember
(
@ID INT
)
RETURNS
@tbChildren TABLE
(
ID INT
)
AS
BEGIN
WITH ChildrenCTE(ID)
AS
(
SELECT UserId FROM dbo.UserRelation WHERE LeaderId=@ID
UNION ALL
SELECT UserRelation.UserId FROM UserRelation INNER JOIN ChildrenCTE ON ChildrenCTE.ID = UserRelation.LeaderId
)
INSERT INTO @tbChildren SELECT Id FROM ChildrenCTE
RETURN
END
GO
調用：
select top 100 * from vi_orderinfo v where exists(
select 1 from dbo.GetTeamMember( 291 ) as a
join dbo.UserCustomer b on a.Id = b.UserId where v.custno = b.customerno)
select top 100 * from vi_orderinfo v where v.custno in (
select b.customerno from dbo.GetTeamMember( 291 ) as a
join dbo.UserCustomer b on a.Id = b.UserId )
個人參考學習用