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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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SQL Serverº¯Êý´óÈ«

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use pubs
go
select avg(distinct price)  --Ëãƽ¾ùÊý
from titles
where type='business'
go 
use pubs
go
select max(ytd_sales)  --×î´óÊý
from titles
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use pubs
go
select min(ytd_sales) --×îÐ¡Ê ......

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create table test(id int,name varchar(20),quarter int,profile int)
insert into test values(1,'a',1,1000)
insert into test values(1,'a',2,2000)
insert into test values(1,'a',3,4000)
insert into test values(1,'a',4,5000)
insert into test values(2,'b',1,3000)
insert into test values(2, ......

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What Is SQL?

What Is SQL?
SQL (pronounced as the letters S-Q-L or as sequel) is an abbreviation for Structured Query Language. SQL is a language designed specifically for communicating with databases.
Unlike other languages (spoken languages like English, or programming languages like Java or Visual Basic), SQ ......

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cmd>net start mssqlserver
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cmd>net start mssql$[instance name]
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