/****** Object: StoredProcedure [dbo].[up_PageSplit] Script Date: 03/18/2013 17:19:57 ******/ /*--实现分页的通用存储过程 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 如果使用查询语句,而且查询语句使用了order by,则查询语句必须包含top 语句--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 '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'--*//* 修改 1、为了提高关联表查询效率，增加一个参数@CoreTable.仍兼容原来的用法。 如果原过程已有调用，可以把该参数放在最后，则不用改动原来的调用代码。 关于应用@CoreTable时的要求，请参见参数后的说明。 如果执行发生问题， 请检查输出的sql语句。 --- ybs 2007.6.28 2、增加了@DoCount参数，当此参数值为１时，以第二个结果集的形式返回总记录数。 --- ybs 2007.6.28*/if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[up_PageSplit] ') and OBJECTPROPERTY(id, N'IsProcedure') = 1)drop procedure [dbo].[p_show]GOcreate Proc [dbo].[up_PageSplit]@QueryStr nvarchar(4000), --表名、视图名、查询语句@CoreTable nvarchar(50)='', --核心表（查询结果中的记录与该表中的记录一一对应） --为提高效率，CoreTable最好使用自增长ＩＤ， --要求CoreTable主键列必须在@QueryStr中存在，且不能重命名@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,如果查询结果不需要标识字段,需要指定此值,且不包含标识字段@FdOrder nvarchar (1000)='', --排序字段列表@DoCount bit = 0 --为0表示不统计总记录数,如果为１,则在第二个结果集中返回总记录数asset nocount ondeclare @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) if(@DoCount = 1) exec( 'select count(*) as RecourdCount from '+ @QueryStr ) returnend--核心表相关if(@Obj_ID is null and @CoreTable <> '')begin set @Obj_ID=object_id(@CoreTable)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')=1begin 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') begin --goto lbusetemp --如果表中无主键,则用临时表处理 /*--用临时表处理的方法--*/ 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 ) --print ('select '+@FdName+'=identity(int,0,1),'+@FdShow+' -- into #tb from'+@QueryStr+@FdOrder+' -- select '+@FdShow+' from #tb where '+@FdName+' between ' -- +@Id1+' and '+@Id2 -- ) if(@DoCount = 1) exec( 'select count(*) as RecourdCount from '+ @QueryStr ) --print 'use temp table' end 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) begin /*--表中有复合主键的处理方法--*/ --goto 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' ) --print ('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' -- ) -- print 'use pk' if(@DoCount = 1) exec( 'select count(*) as RecourdCount from '+ @QueryStr ) return end end endendelse begin --goto lbusetemp /*--如果是视图，用临时表处理的方法--*/ 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 ) --print ('select '+@FdName+'=identity(int,0,1),'+@FdShow+' -- into #tb from'+@QueryStr+@FdOrder+' -- select '+@FdShow+' from #tb where '+@FdName+' between ' -- +@Id1+' and '+@Id2 -- ) if(@DoCount = 1) exec( 'select count(*) as RecourdCount from '+ @QueryStr ) --print 'use temp table' returnend /*--如果是表，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 ) --print 'select top '+@Id1+@FdShow+' from '+@QueryStr -- +' where '+@FdName+' not in(select top ' -- +@Id2+''+@FdName+' from '+@QueryStr+@FdOrder -- +')'+@FdOrder --print 'use identity' if(@DoCount = 1) exec( 'select count(*) as RecourdCount from '+ @QueryStr ) return/***********************分页过程 over***************************/GO
