/*--用存儲過程實現的分頁程式
顯示指定表、視圖、查詢結果的第X頁
對於表中主鍵或標識列的情況,直接從原表取數查詢，其他情況使用臨時表的方法
如果視圖或查詢結果中有主鍵,不推薦此方法
--鄒建 2003.09(引用請保留此資訊)--*/
/**//*--調用示例
select top 20 * from product_schedule where brand='oem'
exec p_show 'product_schedule',10,2,'','schedule_id'
select top 20 * from product_schedule where brand='oem' and 1=2
exec p_show 'select schedule_id, priority, merchandising_team, merchandizer, customer,brand from product_schedule where brand=''oem'' and 1=1 ',
10,2,' priority, merchandising_team, merchandizer, customer','schedule_id'
select * from uv_product_report order by year,month,day,product_dest,brand,styling,qty
exec p_show 'uv_product_report',1500,4,'year,month,day,product_dest,brand,styling,qty','year,month,day,product_dest,brand,styling,qty'
--*/
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 dbo. p_show
@QueryStr nvarchar(4000), --表名、視圖名、查詢語句
@PageSize int=10, --每頁的大小(行數)
@PageCurrent int=1, --要顯示的頁
@FdShow nvarchar (4000)='',--要顯示的欄位列表,如果查詢結果有標識欄位,需要指定此值,且不包含標識欄位
@FdOrder nvarchar (1000)='' --排序欄位列表
as
declare @FdName nvarchar(250) --表中的主鍵或表、臨時表中的標識列名
,@Id1 varchar(20),@Id2 varchar(20) --開始和結束的記錄號
,@Obj_ID int --對象ID
--表中有複合主鍵的處理
declare @strfd nvarchar(2000) --複合主鍵列表
,@strjoin nvarchar(4000) --連接欄位
,@strwhere nvarchar(2000) --查詢條件
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
--如果顯示第一頁，可以直接用top來完成
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,則檢查表中是否有標識更或主鍵
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 --如果表中無標識列,則檢查表中是否有主鍵
begin
if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype='PK')
goto lbusetemp --如果表中無主鍵,則用臨時表處理
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 --檢查表中的主鍵是否為複合主鍵
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
/**//*--使用標識列或主鍵為單一欄位的處理方法--*/
lbuseidentity:
exec('select top '+@Id1+@FdShow+' from '+@QueryStr
+' where '+@FdName+' not in(select top '
+@Id2+' '+@FdName+' from '+@QueryStr+@FdOrder
+')'+@FdOrder
)
return
/**//*--表中有複合主鍵的處理方法--*/
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
/**//*--用臨時表處理的方法--*/
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
