SELECT TOP 10 *
FROM table
WHERE (Key NOT IN
(SELECT TOP 10 Key
FROM table
))
not in 效率好像不高。
在数据量不大的时候,翻页实现起来比较容易,但是,如果是10多万条数据,这种方法就太不好了。
哪位老大能给指点一个新的效率比较高的写法?
感激不尽。。。
3 个解决方案
#1
--功能:通用数据库分页
--设计:王文涛
--电邮:wwtcpu@163.com
--QQ: 471432567
CREATE PROCEDURE Ture_Page
@PageSize int, --每页的行数
@PageIndex int, --1 代表第一页
@Col varchar(200), --要显示的字段
@Table varchar(200), --所用到的表,复条的话就写from与where之间的内容
@Where varchar(200)='', --所用到的条件
@OKey varchar(50), --排序字段
@Order varchar(20)='ASC' --排序方式
as
declare @cmdstr varchar(2000)
set nocount on
set @cmdstr='select top '
set @cmdstr=@cmdstr+convert(nvarchar,@PageSize)
if @Order='DESC' and @PageIndex>1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'<'
else if @PageIndex=1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>='
else
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>'
if @PageIndex>1
begin
if @Order='ASC'
set @cmdstr=@cmdstr+'(select max ('+@OKey+') from (select top '
else
set @cmdstr=@cmdstr+'(select min ('+@OKey+') from (select top '
set @cmdstr=@cmdstr+convert(nvarchar,(@PageIndex-1)*@PageSize)
set @cmdstr=@cmdstr+' '+@OKey+' from '+@Table+' order by '+@OKey+' '+@Order+') as t) '
end
else
set @cmdstr=@cmdstr+'0 '
if @Where<>''
set @cmdstr=(@cmdstr+' and '+@Where+' order by '+@OKey+' '+@Order)
else
set @cmdstr=(@cmdstr+'order by '+@OKey+' '+@Order)
print @cmdstr
exec(@cmdstr)
set nocount off
GO
--设计:王文涛
--电邮:wwtcpu@163.com
--QQ: 471432567
CREATE PROCEDURE Ture_Page
@PageSize int, --每页的行数
@PageIndex int, --1 代表第一页
@Col varchar(200), --要显示的字段
@Table varchar(200), --所用到的表,复条的话就写from与where之间的内容
@Where varchar(200)='', --所用到的条件
@OKey varchar(50), --排序字段
@Order varchar(20)='ASC' --排序方式
as
declare @cmdstr varchar(2000)
set nocount on
set @cmdstr='select top '
set @cmdstr=@cmdstr+convert(nvarchar,@PageSize)
if @Order='DESC' and @PageIndex>1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'<'
else if @PageIndex=1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>='
else
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>'
if @PageIndex>1
begin
if @Order='ASC'
set @cmdstr=@cmdstr+'(select max ('+@OKey+') from (select top '
else
set @cmdstr=@cmdstr+'(select min ('+@OKey+') from (select top '
set @cmdstr=@cmdstr+convert(nvarchar,(@PageIndex-1)*@PageSize)
set @cmdstr=@cmdstr+' '+@OKey+' from '+@Table+' order by '+@OKey+' '+@Order+') as t) '
end
else
set @cmdstr=@cmdstr+'0 '
if @Where<>''
set @cmdstr=(@cmdstr+' and '+@Where+' order by '+@OKey+' '+@Order)
else
set @cmdstr=(@cmdstr+'order by '+@OKey+' '+@Order)
print @cmdstr
exec(@cmdstr)
set nocount off
GO
#2
忘了说了,实际用是把 print @cmdstr 这一行去掉就行了,那一句是我在测试时加上的
#3
mark
#1
--功能:通用数据库分页
--设计:王文涛
--电邮:wwtcpu@163.com
--QQ: 471432567
CREATE PROCEDURE Ture_Page
@PageSize int, --每页的行数
@PageIndex int, --1 代表第一页
@Col varchar(200), --要显示的字段
@Table varchar(200), --所用到的表,复条的话就写from与where之间的内容
@Where varchar(200)='', --所用到的条件
@OKey varchar(50), --排序字段
@Order varchar(20)='ASC' --排序方式
as
declare @cmdstr varchar(2000)
set nocount on
set @cmdstr='select top '
set @cmdstr=@cmdstr+convert(nvarchar,@PageSize)
if @Order='DESC' and @PageIndex>1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'<'
else if @PageIndex=1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>='
else
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>'
if @PageIndex>1
begin
if @Order='ASC'
set @cmdstr=@cmdstr+'(select max ('+@OKey+') from (select top '
else
set @cmdstr=@cmdstr+'(select min ('+@OKey+') from (select top '
set @cmdstr=@cmdstr+convert(nvarchar,(@PageIndex-1)*@PageSize)
set @cmdstr=@cmdstr+' '+@OKey+' from '+@Table+' order by '+@OKey+' '+@Order+') as t) '
end
else
set @cmdstr=@cmdstr+'0 '
if @Where<>''
set @cmdstr=(@cmdstr+' and '+@Where+' order by '+@OKey+' '+@Order)
else
set @cmdstr=(@cmdstr+'order by '+@OKey+' '+@Order)
print @cmdstr
exec(@cmdstr)
set nocount off
GO
--设计:王文涛
--电邮:wwtcpu@163.com
--QQ: 471432567
CREATE PROCEDURE Ture_Page
@PageSize int, --每页的行数
@PageIndex int, --1 代表第一页
@Col varchar(200), --要显示的字段
@Table varchar(200), --所用到的表,复条的话就写from与where之间的内容
@Where varchar(200)='', --所用到的条件
@OKey varchar(50), --排序字段
@Order varchar(20)='ASC' --排序方式
as
declare @cmdstr varchar(2000)
set nocount on
set @cmdstr='select top '
set @cmdstr=@cmdstr+convert(nvarchar,@PageSize)
if @Order='DESC' and @PageIndex>1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'<'
else if @PageIndex=1
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>='
else
set @cmdstr=@cmdstr+' '+@Col+' from '+@Table+' where '+@OKey+'>'
if @PageIndex>1
begin
if @Order='ASC'
set @cmdstr=@cmdstr+'(select max ('+@OKey+') from (select top '
else
set @cmdstr=@cmdstr+'(select min ('+@OKey+') from (select top '
set @cmdstr=@cmdstr+convert(nvarchar,(@PageIndex-1)*@PageSize)
set @cmdstr=@cmdstr+' '+@OKey+' from '+@Table+' order by '+@OKey+' '+@Order+') as t) '
end
else
set @cmdstr=@cmdstr+'0 '
if @Where<>''
set @cmdstr=(@cmdstr+' and '+@Where+' order by '+@OKey+' '+@Order)
else
set @cmdstr=(@cmdstr+'order by '+@OKey+' '+@Order)
print @cmdstr
exec(@cmdstr)
set nocount off
GO
#2
忘了说了,实际用是把 print @cmdstr 这一行去掉就行了,那一句是我在测试时加上的
#3
mark