create proc proc_stu 
@sname varchar(20), 
@pwd varchar(20) 
as 
select * from ren where sname=@sname and pwd=@pwd 
go

CREATE PROCEDURE VALIDATE @USERNAME CHAR(20),@PASSWORD CHAR(20),@LEGAL BIT OUTPUT
AS
IF EXISTS(SELECT * FROM REN WHERE SNAME = @USERNAME AND PWD = @PASSWORD) 
SELECT @LEGAL = 1 
ELSE 
SELECT @LEGAL = 0

CREATE PROCEDURE pageTest --用于翻頁的測試
--需要把排序字段放在第一列
(
@FirstID nvarchar(20)=null, --當前頁面里的第一條記錄的排序字段的值
@LastID nvarchar(20)=null, --當前頁面里的最后一條記錄的排序字段的值
@isNext bit=null, --true 1 :下一頁；false 0:上一頁
@allCount int output, --返回總記錄數(shù)
@pageSize int output, --返回一頁的記錄數(shù)
@CurPage int --頁號（第幾頁）0：第一頁；-1最后一頁。
)
AS
if @CurPage=0--表示第一頁
begin
--統(tǒng)計總記錄數(shù)
select @allCount=count(ProductId) from Product_test 
set @pageSize=10
--返回第一頁的數(shù)據(jù)
select top 10 
ProductId,
ProductName,
Introduction 
from Product_test order by ProductId 
end
else if @CurPage=-1--表示最后一頁
select * from 
(select top 10 ProductId,
ProductName,
Introduction
from Product_test order by ProductId desc ) as aa 
order by ProductId
else
begin 
if @isNext=1
--翻到下一頁
select top 10 ProductId,
ProductName,
Introduction
from Product_test where ProductId > @LastID order by ProductId 
else
--翻到上一頁
select * from
(select top 10 ProductId,
ProductName,
Introduction
from Product_test where ProductId < @FirstID order by ProductId desc) as bb order by ProductId
end