存储过程分页

USE [coaleduexamdata]

GO

/****** Object:  StoredProcedure [dbo].[pro_PageCanOrder_2]    Script Date: 12/11/2012 16:43:58 ******/

SET ANSI_NULLS ON

GO

SET QUOTED_IDENTIFIER ON

GO

ALTER PROCEDURE [dbo].[pro_PageCanOrder_2]

@tblName nvarchar(255), -- 表名 

@strGetFields nvarchar(1000), -- 需要返回的列 

@fldName nvarchar(255), -- 排序的字段名 

@PageSize int, -- 页尺寸 

@PageIndex int, -- 页码 

@OrderType bit, -- 设置排序类型, 非 0 值则降序 

@strWhere nvarchar(1500), -- 查询条件 (注意: 不要加 where) 

@rowCount int output --查询到的记录数 

AS 



declare @strSQL nvarchar(4000) -- 主语句 

declare @strTmp nvarchar(4000) -- 临时变量 

declare @strOrder nvarchar(4000) -- 排序类型 

declare @strCountTmp nvarchar(4000) --记录数 

declare @timediff datetime --耗时 



begin 

select @timediff = Getdate() 

if @strWhere !='' 

set @strCountTmp = 'select @rowCount = count(*) from [' + @tblName + '] where '+@strWhere

else 

set @strCountTmp = 'select @rowCount = rowCount_tmp from tmp where (table_tmp = ''' + @tblName +''')' 



exec sp_executesql @strCountTmp,N'@rowCount int out',@rowCount out --输出总记录数 



if @OrderType != 0 

begin 

set @strTmp = '<(select min' 

set @strOrder = ' order by ' + @fldName +' desc' 

--如果@OrderType不是0，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) +' '+@strGetFields+ ' from [' + @tblName + '] where ' + @strWhere + ' ' + @strOrder 

else 

set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' 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 

--以下代码赋予了@strSQL以真正执行的SQL代码 

set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' 

+ @tblName + '] where [' + @fldName + ']' + @strTmp + '(['+ @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' ['+ @fldName + '] from [' + @tblName + ']' + @strOrder + ') as tblTmp)'+ @strOrder 

if @strWhere != '' 

set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' 

+ @tblName + '] where [' + @fldName + ']' + @strTmp + '([' 

+ @fldName + ']) from (select top ' + str((@PageIndex-1)*@PageSize) + ' [' 

+ @fldName + '] from [' + @tblName + '] where ' + @strWhere + ' ' 

+ @strOrder + ') as tblTmp) and ' + @strWhere + ' ' + @strOrder 

end 



end 

exec (@strSQL) 

select datediff(ms,@timediff,GetDate()) as runtime