国产探花免费观看_亚洲丰满少妇自慰呻吟_97日韩有码在线_资源在线日韩欧美_一区二区精品毛片,辰东完美世界有声小说,欢乐颂第一季,yy玄幻小说排行榜完本

首頁 > 數(shù)據(jù)庫 > SQL Server > 正文

淺談基于SQL Server分頁存儲過程五種方法及性能比較

2020-07-25 12:50:29
字體:
供稿:網(wǎng)友

在SQL Server數(shù)據(jù)庫操作中,我們常常會用到存儲過程對實(shí)現(xiàn)對查詢的數(shù)據(jù)的分頁處理,以方便瀏覽者的瀏覽。

創(chuàng)建數(shù)據(jù)庫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

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(shù)  )  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后不支技直接接參數(shù),所以寫成了字符串@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(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  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  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  set nocount off;  end

5、利用臨時表及Row_number

create procedure proc_CTE --利用臨時表及Row_number  (  @pageIndex int, --頁索引  @pageSize int  --頁記錄數(shù)  )  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

以上的五種方法中,網(wǎng)上說第三種利用select top和中間變量的方法是效率最高的。關(guān)于SQL Server分頁存儲過程五種方法及性能比較的全部內(nèi)容就到此結(jié)束了,希望對大家有所幫助。

發(fā)表評論 共有條評論
用戶名: 密碼:
驗(yàn)證碼: 匿名發(fā)表
主站蜘蛛池模板: 中阳县| 乌恰县| 顺义区| 岳池县| 邯郸县| 平远县| 南澳县| 普格县| 三穗县| 宝山区| 湘潭市| 拉萨市| 蓝田县| 青岛市| 修水县| 牡丹江市| 伊吾县| 林周县| 宜城市| 张家港市| 磐石市| 武城县| 葵青区| 泰安市| 江油市| 呼和浩特市| 玉溪市| 成都市| 玛多县| 启东市| 秭归县| 九龙坡区| 喜德县| 五华县| 邵阳县| 临泉县| 宽甸| 长泰县| 资兴市| 澄迈县| 兴义市|