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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