高效分页存储过程

存储过程与页面调用如下：

CREATE PROCEDURE search_sp@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 = '', -- 页码@doCount bit = 0, -- 返回记录总数, 非 0 值则返回@OrderType bit = '', -- 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  nvarchar(4000) -- 主语句declare @strTmp varchar(110) -- 临时变量declare @strOrder varchar(400) -- 排序类型if @doCount != 0beginif @strWhere !=''set @strSQL = 'select count(1) as Total from [' + @tblName + '] where '+@strWhereelseset @strSQL = 'select count(1) as Total from [' + @tblName + ']'end--以上代码的意思是如果@doCount传递过来的不是0，就执行总数统计。以下的所有代码都是@doCount为0的情况

elsebeginif @OrderType != 0beginset @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

elsebeginset @strTmp = '> (select max'set @strOrder = ' order by [' + @fldName +'] asc'endif @PageIndex = 1beginif @strWhere != ''set @strSQL = 'select top ' + str(@PageSize) +' '+@strGetFields+ ' from [' + @tblName + '] where ' + @strWhere + ' ' + @strOrderelseset @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

elsebegin--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)'+ @strOrderif @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 + ' ' + @strOrderendendexec SP_EXECUTESQL @strSQL

GO

页面调用：SearchText=ChkStr(request("SearchText"))types=ChkStr(request("type"))tblName="search_sp"strGetFields="*"fldName="info_id"if trim(SearchText)="" thenresponse.End()end ifif request("page")="" thenpage=1elsepage=request("page")end ifif types<>"" thenstrWhere="title like ''%"&SearchText&"%'' and type=''"&types&"''"elsestrWhere="title like ''%"&SearchText&"%''"end ifstrSql="exec search_sp  'info','info_id,type,sortid,title,dateandtime','info_id',30,'"&page&"',0,1,'"&strWhere&"'"set rs = conn.Execute(strSql)