五種SQL Server分頁(yè)存儲(chǔ)過(guò)程的方法及性能比較
在SQL Server數(shù)據(jù)庫(kù)操作中，我們常常會(huì)用到存儲(chǔ)過(guò)程對(duì)實(shí)現(xiàn)對(duì)查詢的數(shù)據(jù)的分頁(yè)處理，以方便瀏覽者的瀏覽。本文我們總結(jié)了五種SQL Server分頁(yè)存儲(chǔ)過(guò)程的方法，并對(duì)其性能進(jìn)行了比較，接下來(lái)就讓我們來(lái)一起了解一下這一過(guò)程。
創(chuàng)建數(shù)據(jù)庫(kù)data_Test ：
create database data_Test GO use data_Test GO create table tb_TestTable --創(chuàng)建表 ( id int identity(1,1) primary key, userName nvarchar(20) not null, userPWD nvarchar(20) not null, userEmail nvarchar(40) null ) GO
插入數(shù)據(jù)：
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(jìn)行分頁(yè)
具體代碼如下：
create procedure proc_paged_with_notin --利用select top and select not in ( @pageIndex int, --頁(yè)索引 @pageSize int --每頁(yè)記錄數(shù) ) as begin set nocount on; declare @timediff datetime --耗時(shí) 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后不支技直接接參數(shù)，所以寫(xiě)成了字符串@sql select datediff(ms,@timediff,GetDate()) as 耗時(shí) 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(yè)索引 @pageSize int --頁(yè)記錄數(shù) ) 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(shí) set nocount off; end
3、利用select top和中間變量
create procedure proc_paged_with_Midvar --利用ID>最大ID值和中間變量 ( @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 耗時(shí) 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()給數(shù)據(jù)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(shí) set nocount off; end
5、利用臨時(shí)表及Row_number
create procedure proc_CTE --利用臨時(shí)表及Row_number ( @pageIndex int, --頁(yè)索引 @pageSize int --頁(yè)記錄數(shù) ) 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
以上的五種方法中，網(wǎng)上說(shuō)第三種利用select top和中間變量的方法是效率最高的。
關(guān)于SQL Server數(shù)據(jù)庫(kù)分頁(yè)的存儲(chǔ)過(guò)程的五種方法及性能比較的知識(shí)就介紹到這里了，希望對(duì)大家的學(xué)習(xí)有所幫助。
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