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create function [dbo].[DeptTree](@initDeptCode varchar(10))/*¶¨Ò庯Êýc_tree£¬ÊäÈë²ÎÊýΪ³õʼ½ÚµãDeptCode*/
returns @t table(DeptCode varchar(10),UpDeptCode varchar(10),lev int)/*¶¨Òå±ítÓÃÀ´´æ·ÅÈ¡³öµÄÊý¾Ý*/
begin
declare @i int/*±êÖ¾µÝ¹é¼¶±ð*/
set @i=1
insert @t select DeptCode,UpDeptCode,@i from vi_dept where DeptCode=@initDeptCode
while @@rowcount<>0
begin
set @i=@i+1
insert @t select a.DeptCode,a.UpDeptCode,@i from vi_dept as a,@t as b
where b.DeptCode=a.UpDeptCode and b.lev=@i-1
end
return
end
select * from dbo.DeptTree('0000')
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go
select avg(distinct price) --Ëãƽ¾ùÊý
from titles
where type='business'
go
use pubs
go
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CREATE TABLE TongXunLu
(
[tName] nvarchar(30),
[tAddress] nvarchar(50),
[tEmail] varchar(50)
)
--´´½¨±í students
CREATE TABLE students
(
[sId] int IDENTITY (1, 1) primary key NOT NULL ,
[sName] varchar (50) NOT ......
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DataSet ds = new DataSet();
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