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  • 创建大容量测试数据

    create database data_Test  --创建数据库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
     
    -- --插入数据
    set identity_insert tb_TestTable on --自己插入nameid字段值用set identity_insert on手动插入了
    declare @count int
    set @count=1
    while @count<=2000000
    begin  
    insert into tb_TestTable(id,userName,userPWD,userEmail) values(@count,'admin','admin888','admin@yahoo.com.cn')
    set @count=@count+1
    end
    set identity_insert tb_TestTable OFF


    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)
    SET @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


    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)
    SET @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


    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


    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 t where t.IDRank>@pageSize*@pageIndex and t.IDRank<@pageSize*(@pageIndex+1)
    select datediff(ms,@timediff,getdate()) as 耗时
    set nocount off;
    end

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  • 原文地址:https://www.cnblogs.com/gossip/p/3806351.html
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