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/*--用存儲過程實現(xiàn)的分頁程序
顯示指定表、視圖、查詢結果的第x頁
對于表中主鍵或標識列的情況,直接從原表取數(shù)查詢，其它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
--*/
/*--調用示例
exec p_show '地區(qū)資料'
exec p_show '地區(qū)資料',5,3,'地區(qū)編號,地區(qū)名稱,助記碼','地區(qū)編號'
--*/
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、視圖名、查詢語句
@pagesize int=10, --每頁的大小(行數(shù))
@pagecurrent int=1, --要顯示的頁
@fdshow nvarchar (4000)='', --要顯示的字段列表,如果查詢結果有標識字段,需要指定此值,且不包含標識字段
@fdorder nvarchar (1000)='' --排序字段列表
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
--表中有復合主鍵的處理
declare @strfd nvarchar(2000) --復合主鍵列表
,@strjoin nvarchar(4000) --連接字段
,@strwhere nvarchar(2000) --查詢條件
select @obj_id=object_id(@querystr)
,@fdshow=case isnull(@fdshow,'') when '' then ' *' else ' '[email protected] end
,@fdorder=case isnull(@fdorder,'') when '' then '' else ' order by '[email protected] end
,@querystr=case when @obj_id is not null then ' '[email protected] else ' ('[email protected]+') 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 '[email protected][email protected]+' from '[email protected][email protected])
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 [email protected]_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 [email protected]_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 [email protected]_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 [email protected]_id
)))
if @@rowcount>1 --檢查表中的主鍵是否為復合主鍵
begin
select @strfd='',@strjoin='',@strwhere=''
select @[email protected]+',['+name+']'
,@[email protected]+' and a.['+name+']=b.['+name+']'
,@[email protected]+' and b.['+name+'] is null'
from syscolumns where [email protected]_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 [email protected]_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字段的處理方法--*/
lbuseidentity:
exec('select top '[email protected][email protected]+' from '[email protected]
+' where '[email protected]+' not in(select top '
[email protected]+' '[email protected]+' from '[email protected][email protected]
+')'[email protected]
)
return
/*--表中有復合主鍵的處理方法--*/
lbusepk:
exec('select '[email protected]+' from(select top '[email protected]+' a.* from
(select top 100 percent * from '[email protected][email protected]+') a
left join (select top '[email protected]+' '[email protected]+'
from '[email protected][email protected]+') b on '[email protected]+'
where '[email protected]+') 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 '[email protected]+'=identity(int,0,1),'[email protected]+'
into #tb from'[email protected][email protected]+'
select '[email protected]+' from #tb where '[email protected]+' between '
[email protected]+' and '[email protected]
)
go
