我在网上搜索了下面这个SQL存储过程
在一百二十万条记录中测试,
以每页10为大小,查询第10000页的记录,
结果用时15秒!
求高手给个真正高效的分页存储过程!
- SQL code
-- 获取指定页的数据 CREATE PROCEDURE pagination@tblName varchar(255), -- 表名 @strGetFields varchar(1000) = '*', -- 需要返回的列 @fldName varchar(255)='', -- 排序的字段名 @PageSize int = 10, -- 页尺寸 @PageIndex int = 1, -- 页码 @doCount bit = 0, -- 返回记录总数, 非 0 值则返回 @OrderType bit = 0, -- 设置排序类型, 非 0 值则降序 @strWhere varchar(1500) = '' -- 查询条件 (注意: 不要加 where) AS declare @strSQL varchar(5000) -- 主语句 declare @strTmp varchar(110) -- 临时变量 declare @strOrder varchar(400) -- 排序类型 if @doCount != 0 begin if @strWhere !='' set @strSQL = "select count(*) as Total from [" + @tblName + "] where "[email protected] else set @strSQL = "select count(*) as Total from [" + @tblName + "]" end [email protected],[email protected]?情况 else begin if @OrderType != 0 begin set @strTmp = "<(select min" set @strOrder = " order by [" + @fldName +"] desc" [email protected],就执行降序,这句很重要! end else begin set @strTmp = ">(select max" set @strOrder = " order by [" + @fldName +"] asc" end if @PageIndex = 1 begin if @strWhere != '' set @strSQL = "select top " + str(@PageSize) +" "[email protected]+ " from [" + @tblName + "] where " + @strWhere + " " + @strOrder else set @strSQL = "select top " + str(@PageSize) +" "[email protected]+ " from ["+ @tblName + "] "+ @strOrder --如果是第一页就执行以上代码,这样会加快执行速度 end else begin [email protected] set @strSQL = "select top " + str(@PageSize) +" "[email protected]+ " from [" + @tblName + "] where [" + @fldName + "]" + @strTmp + "(["+ @fldName + "]) from (select top " + str((@PageIndex-1)[email protected]) + " ["+ @fldName + "] from [" + @tblName + "]" + @strOrder + ") as tblTmp)"+ @strOrder if @strWhere != '' set @strSQL = "select top " + str(@PageSize) +" "[email protected]+ " from [" + @tblName + "] where [" + @fldName + "]" + @strTmp + "([" + @fldName + "]) from (select top " + str((@PageIndex-1)[email protected]) + " [" + @fldName + "] from [" + @tblName + "] where " + @strWhere + " " + @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder end end exec (@strSQL)GO
------解决方案--------------------
- SQL code
1--------------------------------------------------游标不是明智的选择,在小数据量时可以使用create procedure hahaha @sqlstr nvarchar(4000), --查询字符串 @currentpage int, --第N页 @pagesize int --每页行数 as set nocount on declare @P1 int, --P1是游标的id @rowcount int exec sp_cursoropen @P1 output,@sqlstr,@scrollopt=1,@ccopt=1,@[email protected] output select ceiling([email protected][email protected]) as 总页数--,@rowcount as 总行数,@currentpage as 当前页 set @currentpage=(@currentpage-1)[email protected]+1 exec sp_cursorfetch @P1,16,@currentpage,@pagesize exec sp_cursorclose @P1 set nocount off 测试: hahaha '任何条件的SQL语句',2,10
------解决方案--------------------
- HTML code
/*--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 ' [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 [email protected][email protected]+' from [email protected][email protected]) 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')=1begin select @Id1=cast(@PageSize as varchar(20)) ,@Id2=cast((@PageCurrent-1)[email protected] as varchar(20)) select @FdName=name from syscolumns where [email protected]_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 [email protected]_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 [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 --检查表中的主键是否为复合主键 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 endendelse goto lbusetemp/*--使用标识列或主键为单一字段的处理方法--*/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/*--表中有复合主键的处理方法--*/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(@[email protected] as varchar(20))exec('select [email protected]+'=identity(int,0,1),[email protected]+' into #tb [email protected][email protected]+' select [email protected]+' from #tb where [email protected]+' between ' [email protected]+' and [email protected] )GO