幾種SQL Server分頁的預存程序寫法以及效能比較

幾種SQL Server分頁的預存程序寫法以及效能比較
預存程序的5種分頁寫法,下面的代碼是從忘了什麼時候從別人那Ctrl+C來的,所以僅僅作為收藏,希望作者看到不要噴我.
 ------建立資料庫教程data_Test -----
create database data_Test
 GO
use data_Test
GO
create table tb_TestTable   --建立表
(
    id int identity(1,1) primary key,
    userName nvarchar(20) not null,
    userPWD nvarchar(20) not null,
    userEmail nvarchar(40) null
)
GO

------插入資料------
 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

---1、利用select top 和select not in進行分頁，具體代碼如下
create procedure proc_paged_with_notin  --利用select top and select not in
 (
     @pageIndex int,  --頁索引
     @pageSize int    --每頁記錄數
 )
 as
 begin
     set nocount on;
     declare @timediff datetime --耗時
    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後不支技直接接參數，所以寫成了字串@sql
    select datediff(ms,@timediff,GetDate()) as 耗時
    set nocount off;
end

---2、利用select top 和 select max(列鍵)---

 create procedure proc_paged_with_selectMax  --利用select top and select max(列)
 (
     @pageIndex int,  --頁索引
     @pageSize int    --頁記錄數
 )
 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 耗時
set nocount off;
end
 

---3、利用select top和中間變數--此方法因網上有人說效果最佳---

 create procedure proc_paged_with_Midvar  --利用ID>最大ID值和中間變數
 (
     @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 耗時
set nocount off;
end

---4、利用Row_number() 此方法為SQL server 2005中新的方法,利用Row_number()給資料行加上索引

 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 耗時
set nocount off;
end

---5、利用暫存資料表及Row_number
 create procedure proc_CTE  --利用暫存資料表及Row_number
 (
     @pageIndex int,  --頁索引
     @pageSize int    --頁記錄數
 )
 as
     set nocount on;
     declare @ctestr nvarchar(400)
     declare @strSql nvarchar(400)
    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