高效储存过程分页

来源：互联网发布：100以内的质数java 编辑：程序博客网时间：2024/05/16 12:14
CREATE   PROCEDURE [dbo].[Common] @strTable varchar(30),--表名@strFields varchar(300),--检索的字段@strSortField varchar(30),--排序的字段@PageIndex  int =1,       --页码@PgSize int,--每页大小@doCount   bit=0,       --返回记录总数，非0则返回@strWhere  varchar(1500)=''     --查询条件（注意不带where）ASdeclare  @strSQL  varchar(5000)           --主语句declare  @strTmp   varchar(110)            --临时变量declare  @strOrder  varchar(400)           --排序类型declare  @tblName   varchar(255)           --表名declare  @strGetFields varchar(1000)     --需要返回的列declare  @fidName varchar(255)       --排序的字段名declare  @PageSize  int        --页大小declare  @OrderType   bit    --设置排序类型，非0则降序set @tblName=@strTableset @strGetFields=@strFieldsset @fidName=@strSortFieldset @PageSize=@PgSizeset @OrderType=1if @doCount !=0    --返回记录总数  begin       if @strWhere != ''           set @strSQL=" select  count(1) as Total  from ["+@tblName+"] where "+@strWhere       else          set @strSQL=" select  count(1) as Total  from ["+@tblName+"]"   endelse  begin     if @OrderType !=0         begin            set @strTmp="<( select min "            set  @strOrder = "  order by ["+@fidName+"]  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 ["+@fidName+"]  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 [" + @fidName + "]" + @strTmp + "(["+ @fidName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["+ @fidName + "] from [" + @tblName + "]" + @strOrder + ") as tblTmp)"+ @strOrder                        if @strWhere != ''                 set @strSQL = "select  top " + str(@PageSize) +" "+@strGetFields+ "  from ["                                         + @tblName + "] where [" + @fidName + "]" + @strTmp + "(["                                          + @fidName + "]) from (select top " + str((@PageIndex-1)*@PageSize) + " ["                                        + @fidName + "] from [" + @tblName + "] where " + @strWhere + " "                                        + @strOrder + ") as tblTmp) and " + @strWhere + " " + @strOrder       end   end   exec(@strSQL)GO
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