递归查询，记录一下，
CREATE TABLE [abc](
[id] [int] NULL,
[pid] [int] NULL,
[name] [nchar](10)
)
GO
INSERT INTO [abc] VALUES(1,'a')
INSERT INTO [abc] VALUES(2,'b')
INSERT INTO [abc] VALUES(3,1,'c')
INSERT INTO [abc] VALUES(4,'d')
INSERT INTO [abc] VALUES(5,2,'e')
INSERT INTO [abc] VALUES(6,3,'f')
INSERT INTO [abc] VALUES(7,'g')
INSERT INTO [abc] VALUES(8,4,'h')
GO
--begin
with Dep as
(
select id,pid,[name] from abc where id=1
union all
select d.id,d.pid,d.[name] from Dep inner join abc d on Dep.id=d.pid
)
select * from Dep
-- end
上边是个整体的sql,开始以为后边的select是单独的呢
找的资料，自己记录一下
