/*--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--*/
/*--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'--*/
/*因为要顾及通用性,所以对带排序的查询语句有一定要求.如果先排序,再出结果.就是:
exec p_show 'select top 100 percent * from 地区资料 order by 地区名称',5,3,'地区编号,地区名称,助记码','地区名称'
--查询语句加上:top 100 percent //top时*/
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]GO
CREATE 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asdeclare @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 beginselect @Id1=cast(@PageSize as varchar(20))exec('select top ' @Id1 @FdShow ' from ' @QueryStr @FdOrder)returnend
--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')=1beginselect @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=0x80if @@rowcount=0 --如果表中无标识列,则检查表中是否有主键beginif 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beginselect @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 lbusepkendendendelsegoto 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 ') aleft 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