高效分页存储过程

    技术2022-05-11  12

    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 != 0 begin if @strWhere !='' set @strSQL = 'select count(1) as Total from [' + @tblName + '] where '+@strWhere else set @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

    else begin 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 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)


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