大数据量存储分页
五种常用存储过程:
1,利用select top 和select not in进行分页,具体代码如下:
1 create procedure proc_paged_with_notin --利用select top and select not in
2
(
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@pageIndex int, --页索引
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@pageSize int --每页记录数
5
)
6
as
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begin
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set nocount on;
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declare @timediff datetime --耗时
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declare @sql nvarchar(500)
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select @timediff=Getdate()
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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'
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execute(@sql) --因select top后不支技直接接参数,所以写成了字符串@sql
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select datediff(ms,@timediff,GetDate()) as 耗时
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set nocount off;
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end
2,利用select top 和 select max(列键)
1
create procedure proc_paged_with_selectMax --利用select top and select max(列)
2
(
3
@pageIndex int, --页索引
4
@pageSize int --页记录数
5
)
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as
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begin
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set nocount on;
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declare @timediff datetime
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declare @sql nvarchar(500)
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select @timediff=Getdate()
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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'
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execute(@sql)
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select datediff(ms,@timediff,GetDate()) as 耗时
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set nocount off;
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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
1
create procedure proc_paged_with_Midvar --利用ID>最大ID值和中间变量
2
(
3
@pageIndex int,
4
@pageSize int
5
)
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as
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declare @count int
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declare @ID int
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declare @timediff datetime
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declare @sql nvarchar(500)
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begin
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set nocount on;
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select @count=0,@ID=0,@timediff=getdate()
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select @count=@count+1,@ID=case when @count<=@pageSize*@pageIndex then ID else @ID end from tb_testTable order by id
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set @sql='select top '+str(@pageSize)+' * from tb_testTable where ID>'+str(@ID)
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execute(@sql)
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select datediff(ms,@timediff,getdate()) as 耗时
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set nocount off;
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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
1
create procedure proc_paged_with_Rownumber --利用SQL 2005中的Row_number()
2
(
3
@pageIndex int,
4
@pageSize int
5
)
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as
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declare @timediff datetime
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begin
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set nocount on;
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select @timediff=getdate()
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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)
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select datediff(ms,@timediff,getdate()) as 耗时
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set nocount off;
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end
5,利用临时表及Row_number
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create procedure proc_CTE --利用临时表及Row_number
2
(
3
@pageIndex int, --页索引
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@pageSize int --页记录数
5
)
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as
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set nocount on;
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declare @ctestr nvarchar(400)
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declare @strSql nvarchar(400)
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declare @datediff datetime
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begin
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select @datediff=GetDate()
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set @ctestr='with Table_CTE as
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(select ceiling((Row_number() over(order by ID ASC))/'+str(@pageSize)+') as page_num,* from tb_TestTable)';
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set @strSql=@ctestr+' select * From Table_CTE where page_num='+str(@pageIndex)
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end
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begin
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execute sp_executesql @strSql
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select datediff(ms,@datediff,GetDate())
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set nocount off;
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end

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