在SQL Server数据库操作中,我们常常会用到存储过程对实现对查询的数据的分页处理,以方便浏览者的浏览。
创建数据库data_Test :
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create database data_Test
GO
use data_Test
GO
create table tb_TestTable --创建表
(
id int identity(1,1) primary key ,
userName nvarchar(20) not null ,
userPWD nvarchar(20) not null ,
userEmail nvarchar(40) null
)
GO
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插入数据:
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set identity_insert tb_TestTable on
declare @ count int
set @ count =1
while @ count <=2000000
begin
insert into tb_TestTable(id,userName,userPWD,userEmail) values (@ count , 'admin' , 'admin888' , 'lli0077@yahoo.com.cn' )
set @ count =@ count +1
end
set identity_insert tb_TestTable off
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1、利用select top 和select not in进行分页
具体代码如下:
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create procedure proc_paged_with_notin --利用select top and select not in
(
@pageIndex int , --页索引
@pageSize int --每页记录数
)
as
begin
set nocount on ;
declare @timediff datetime --耗时
declare @sql nvarchar(500)
select @timediff=Getdate()
set @sql= 'select top ' +str(@pageSize)+ ' * from tb_TestTable where(ID not in(select top ' +str(@pageSize*@pageIndex)+ ' id from tb_TestTable order by ID ASC)) order by ID'
execute (@sql) --因select top后不支技直接接参数,所以写成了字符串@sql
select datediff(ms,@timediff,GetDate()) as 耗时
set nocount off ;
end
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2、利用select top 和 select max(列键)
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create procedure proc_paged_with_selectMax --利用select top and select max(列)
(
@pageIndex int , --页索引
@pageSize int --页记录数
)
as
begin
set nocount on ;
declare @timediff datetime
declare @sql nvarchar(500)
select @timediff=Getdate()
set @sql= 'select top ' +str(@pageSize)+ ' * From tb_TestTable where(ID>(select max(id) From (select top ' +str(@pageSize*@pageIndex)+ ' id From tb_TestTable order by ID) as TempTable)) order by ID'
execute (@sql)
select datediff(ms,@timediff,GetDate()) as 耗时
set nocount off ;
end
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3、利用select top和中间变量
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create procedure proc_paged_with_Midvar --利用ID>最大ID值和中间变量
(
@pageIndex int ,
@pageSize int
)
as
declare @ count int
declare @ID int
declare @timediff datetime
declare @sql nvarchar(500)
begin
set nocount on ;
select @ count =0,@ID=0,@timediff=getdate()
select @ count =@ count +1,@ID= case when @ count <=@pageSize*@pageIndex then ID else @ID end from tb_testTable order by id
set @sql= 'select top ' +str(@pageSize)+ ' * from tb_testTable where ID>' +str(@ID)
execute (@sql)
select datediff(ms,@timediff,getdate()) as 耗时
set nocount off ;
end
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4、利用Row_number() 此方法为SQL server 2005中新的方法,利用Row_number()给数据行加上索引
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create procedure proc_paged_with_Rownumber --利用SQL 2005中的Row_number()
(
@pageIndex int ,
@pageSize int
)
as
declare @timediff datetime
begin
set nocount on ;
select @timediff=getdate()
select * from ( select *,Row_number() over( order by ID asc ) as IDRank from tb_testTable) as IDWithRowNumber where IDRank>@pageSize*@pageIndex and IDRank<@pageSize*(@pageIndex+1)
select datediff(ms,@timediff,getdate()) as 耗时
set nocount off ;
end
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5、利用临时表及Row_number
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create procedure proc_CTE --利用临时表及Row_number
(
@pageIndex int , --页索引
@pageSize int --页记录数
)
as
set nocount on ;
declare @ctestr nvarchar()
declare @strSql nvarchar()
declare @datediff datetime
begin
select @datediff=GetDate()
set @ctestr= 'with Table_CTE as
(select ceiling((Row_number() over(order by ID ASC))/' +str(@pageSize)+ ') as page_num,* from tb_TestTable)' ;
set @strSql=@ctestr+ ' select * From Table_CTE where page_num=' +str(@pageIndex)
end
begin
execute sp_executesql @strSql
select datediff(ms,@datediff,GetDate())
set nocount off ;
end
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以上的五种方法中,网上说第三种利用select top和中间变量的方法是效率最高的。关于SQL Server分页存储过程五种方法及性能比较的全部内容就到此结束了,希望对大家有所帮助。