第一种,用变量表做法:
ALTER PROCEDURE [dbo].[Sel_Pro]
-- Add the parameters for the stored procedure here
@pageIndex int,
@pageSize int,
@IsSort varchar(20)
--@TaxisField varchar(30)
AS
set nocount on
begin
declare @indextable table(id int identity(1,1),nid int) --定义表变量
declare @PageLowerBound int --定义此页的底码
declare @PageUpperBound int --定义此页的顶码
set @PageLowerBound=(@pageindex-1)*@pagesize
set @PageUpperBound=@PageLowerBound+@pagesize
insert into @indextable(nid) select Pro_Id from Products Order by @IsSort --排序字段
select * from Products O,@indextable t where O.Pro_Id=t.nid
and t.id>@PageLowerBound and t.id<=@PageUpperBound order by t.id
第二种,用top嵌套的方法,用正反排序的方法
CREATE PROCEDURE [dbo].[Zhzuo_GetItemsPage2005TOP]
@PageIndex INT,
@PageSize INT,
@RecordCount INT OUT,
@PageCount INT OUT
AS
/*获取记录数*/
SELECT @RecordCount = COUNT(*) FROM Production.Product
/*计算页面数据*/
SET @PageCount = CEILING(@RecordCount * 1.0 / @PageSize)
/*TOP记录数*/
DECLARE @TOPCOUNT INT
SET @TOPCOUNT = @RecordCount - @PageSize * @PageIndex /*基于SQL SERVER 2005 */
IF @PageIndex = 0 OR @PageCount <= 1
BEGIN
SELECT TOP(@PageSize) ProductID,Name FROM Production.Product ORDER BY ProductID DESC
END
ELSE
BEGIN
IF @PageIndex = @PageCount - 1
BEGIN
SELECT * FROM ( SELECT TOP(@TOPCOUNT) ProductID,Name FROM Production.Product ORDER BY ProductID ASC) T
ORDER BY ProductID DESC
END
ELSE
BEGIN
SELECT TOP(@PageSize) * FROM (SELECT TOP(@TOPCOUNT) ProductID,Name FROM Production.Product ORDER BY ProductID ASC) T
ORDER BY ProductID DESC
END
END
________________________________
我个人用的是第一种方法,但我更想用第二种方法,因为他看上去效率更高一些,但是它可以支持任意字段的排序吗?或者说他用任意字段的排序会不会效率很低(因为不能有多个聚集所引,order by 在聚集所引上效率最高,这是我通过查阅资料得到的总结)我如果用每一种方法,我每查一次表都要把product表中的ID插入一个变量表,这样做的效率又如何(假如我有十万条记录),请教!不胜感激~~~~~
ALTER PROCEDURE [dbo].[Sel_Pro]
-- Add the parameters for the stored procedure here
@pageIndex int,
@pageSize int,
@IsSort varchar(20)
--@TaxisField varchar(30)
AS
set nocount on
begin
declare @indextable table(id int identity(1,1),nid int) --定义表变量
declare @PageLowerBound int --定义此页的底码
declare @PageUpperBound int --定义此页的顶码
set @PageLowerBound=(@pageindex-1)*@pagesize
set @PageUpperBound=@PageLowerBound+@pagesize
insert into @indextable(nid) select Pro_Id from Products Order by @IsSort --排序字段
select * from Products O,@indextable t where O.Pro_Id=t.nid
and t.id>@PageLowerBound and t.id<=@PageUpperBound order by t.id
第二种,用top嵌套的方法,用正反排序的方法
CREATE PROCEDURE [dbo].[Zhzuo_GetItemsPage2005TOP]
@PageIndex INT,
@PageSize INT,
@RecordCount INT OUT,
@PageCount INT OUT
AS
/*获取记录数*/
SELECT @RecordCount = COUNT(*) FROM Production.Product
/*计算页面数据*/
SET @PageCount = CEILING(@RecordCount * 1.0 / @PageSize)
/*TOP记录数*/
DECLARE @TOPCOUNT INT
SET @TOPCOUNT = @RecordCount - @PageSize * @PageIndex /*基于SQL SERVER 2005 */
IF @PageIndex = 0 OR @PageCount <= 1
BEGIN
SELECT TOP(@PageSize) ProductID,Name FROM Production.Product ORDER BY ProductID DESC
END
ELSE
BEGIN
IF @PageIndex = @PageCount - 1
BEGIN
SELECT * FROM ( SELECT TOP(@TOPCOUNT) ProductID,Name FROM Production.Product ORDER BY ProductID ASC) T
ORDER BY ProductID DESC
END
ELSE
BEGIN
SELECT TOP(@PageSize) * FROM (SELECT TOP(@TOPCOUNT) ProductID,Name FROM Production.Product ORDER BY ProductID ASC) T
ORDER BY ProductID DESC
END
END
________________________________
我个人用的是第一种方法,但我更想用第二种方法,因为他看上去效率更高一些,但是它可以支持任意字段的排序吗?或者说他用任意字段的排序会不会效率很低(因为不能有多个聚集所引,order by 在聚集所引上效率最高,这是我通过查阅资料得到的总结)我如果用每一种方法,我每查一次表都要把product表中的ID插入一个变量表,这样做的效率又如何(假如我有十万条记录),请教!不胜感激~~~~~
原理根唯一、主键、复合主键进行判断分页,如果没有通过临时表分页。效率高
/*--用存储过程实现的分页程序 显示指定表、视图、查询结果的第X页
对于表中主键或标识列的情况,直接从原表取数查询,其它情况使用临时表的方法
如果视图或查询结果中有主键,不推荐此方法--邹建 2003.09(引用请保留此信息)--*//*--调用示例
exec p_show '地区资料' exec p_show '地区资料',5,3,'地区编号,地区名称,助记码','地区编号'
--*/if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_show]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_show]
GOCREATE Proc p_show
@QueryStr nvarchar(4000), --表名、视图名、查询语句
@PageSize int=10, --每页的大小(行数)
@PageCurrent int=1, --要显示的页
@FdShow nvarchar (4000)='', --要显示的字段列表,如果查询结果有标识字段,需要指定此值,且不包含标识字段
@FdOrder nvarchar (1000)='' --排序字段列表
as
declare @FdName nvarchar(250) --表中的主键或表、临时表中的标识列名
,@Id1 varchar(20),@Id2 varchar(20) --开始和结束的记录号
,@Obj_ID int --对象ID
--表中有复合主键的处理
declare @strfd nvarchar(2000) --复合主键列表
,@strjoin nvarchar(4000) --连接字段
,@strwhere nvarchar(2000) --查询条件
select @Obj_ID=object_id(@QueryStr)
,@FdShow=case isnull(@FdShow,'') when '' then ' *' else ' '+@FdShow end
,@FdOrder=case isnull(@FdOrder,'') when '' then '' else ' order by '+@FdOrder end
,@QueryStr=case when @Obj_ID is not null then ' '+@QueryStr else ' ('+@QueryStr+') a' end--如果显示第一页,可以直接用top来完成
if @PageCurrent=1
begin
select @Id1=cast(@PageSize as varchar(20))
exec('select top '+@Id1+@FdShow+' from '+@QueryStr+@FdOrder)
return
end--如果是表,则检查表中是否有标识更或主键
if @Obj_ID is not null and objectproperty(@Obj_ID,'IsTable')=1
begin
select @Id1=cast(@PageSize as varchar(20))
,@Id2=cast((@PageCurrent-1)*@PageSize as varchar(20)) select @FdName=name from syscolumns where id=@Obj_ID and status=0x80
if @@rowcount=0 --如果表中无标识列,则检查表中是否有主键
begin
if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype='PK')
goto lbusetemp --如果表中无主键,则用临时表处理 select @FdName=name from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
if @@rowcount>1 --检查表中的主键是否为复合主键
begin
select @strfd='',@strjoin='',@strwhere=''
select @strfd=@strfd+',['+name+']'
,@strjoin=@strjoin+' and a.['+name+']=b.['+name+']'
,@strwhere=@strwhere+' and b.['+name+'] is null'
from syscolumns where id=@Obj_ID and colid in(
select colid from sysindexkeys where @Obj_ID=id and indid in(
select indid from sysindexes where @Obj_ID=id and name in(
select name from sysobjects where xtype='PK' and parent_obj=@Obj_ID
)))
select @strfd=substring(@strfd,2,2000)
,@strjoin=substring(@strjoin,5,4000)
,@strwhere=substring(@strwhere,5,4000)
goto lbusepk
end
end
end
else
goto lbusetemp/*--使用标识列或主键为单一字段的处理方法--*/
lbuseidentity:
exec('select top '+@Id1+@FdShow+' from '+@QueryStr
+' where '+@FdName+' not in(select top '
+@Id2+' '+@FdName+' from '+@QueryStr+@FdOrder
+')'+@FdOrder
)
return/*--表中有复合主键的处理方法--*/
lbusepk:
exec('select '+@FdShow+' from(select top '+@Id1+' a.* from
(select top 100 percent * from '+@QueryStr+@FdOrder+') a
left join (select top '+@Id2+' '+@strfd+'
from '+@QueryStr+@FdOrder+') b on '+@strjoin+'
where '+@strwhere+') a'
)
return/*--用临时表处理的方法--*/
lbusetemp:
select @FdName='[ID_'+cast(newid() as varchar(40))+']'
,@Id1=cast(@PageSize*(@PageCurrent-1) as varchar(20))
,@Id2=cast(@PageSize*@PageCurrent-1 as varchar(20))exec('select '+@FdName+'=identity(int,0,1),'+@FdShow+'
into #tb from'+@QueryStr+@FdOrder+'
select '+@FdShow+' from #tb where '+@FdName+' between '
+@Id1+' and '+@Id2
)GO