| 标题 | sql server 大量数据的分页存储过程代码 |
| 内容 | ok,我们首先创建一数据库：data_test,并在此数据库中创建一表：tb_testtable 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 然后我们在数据表中插入2000000条数据: --插入数据 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 我首先写了五个常用存储过程： 1，利用select top 和select not in进行分页，具体代码如下： 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) 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后不支技直接接参数，所以写成了字符串@sql select datediff(ms,@timediff,getdate()) as 耗时 set nocount off; end 2,利用select top 和 select max(列键) 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) 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 耗时 set nocount off; end 3,利用select top和中间变量--此方法因网上有人说效果最佳，所以贴出来一同测试 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< 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 4,利用row_number() 此方法为sql server 2005中新的方法,利用row_number()给数据行加上索引 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 耗时 set nocount off; end 5，利用临时表及row_number create procedure proc_cte --利用临时表及row_number ( @pageindex int, --页索引 @pagesize int --页记录数 ) 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 ok,至此，存储过程创建完毕，我们分别在每页10条数据的情况下在第2页，第1000页，第10000页，第100000页，第199999页进行测试，耗时单位：ms 每页测试5次取其平均值 |
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