浅谈ACCESS数据库技术的2种分页核心思想

access分页 技术 思想 A： 程序代码 select top 分页数 * from 表 where 主键 not in (select top 第几页*分页数 主键 from 表 where 过滤条件) ACCESS分页 技术 思想 B： 程序代码 select top 页大小 * from 表1 where 主键 (select min(主键) from (select

access分页技术思想A：

 程序代码
select top 分页数 * from 表 where 主键 not in (select top 第几页*分页数 主键 from 表 where 过滤条件)
 

ACCESS分页技术思想B：

 程序代码
select top 页大小 * from 表1 where 主键   

相比这两种设计思想，就大容量的数据而言，譬如一表几万条数据的显示的时候，就能明显的感觉出，前者比后者快了，因为前者不用建立后台临时表处理！，少了一个环节！不过简单的说，还是很容易理解的

打个比方，我一页要五行数据，现在是第三页，那么第几页应该等于需要要的页数乘以记录！

一个基于此思路的分页函数应用：

 程序代码

Function ShowClass(page, Fcount, order, desc)   
    if page = "" or len(page) = 0 then page = 1   
       
     SkinStr = ""  
     pageStr = ""  
     SkinTatol = conn.execute("select count(*) from Skin")(0)   
        
     Filtwheres = "order by "&order" "&desc   
        
     if page > 1 then   
         SkinSQL = "select top "& Fcount " Skin_ID,Skin_Name,Skin_Designer,Skin_PubDate,Skin_DesignerURL,Skin_DesignerMail,Skin_Geterip,Skin_GetTime,LocalSkinInfoPReview,Skin_RandromNumber,Skin_DownCouns,Skin_FromURL from Skin where Skin_ID not in (select top "& ((page -1)* Fcount)" Skin_ID from Skin "&Filtwheres") " & Filtwheres   
     else   
        SkinSQL = "select top "& Fcount " Skin_ID,Skin_Name,Skin_Designer,Skin_PubDate,Skin_DesignerURL,Skin_DesignerMail,Skin_GeterIP,Skin_GetTime,LocalSkinInfoPreview,Skin_RandromNumber,Skin_DownCouns,Skin_FromURL from Skin " & Filtwheres   
     end if   
  
            '------------------ www.knowsky.com 分页栏 ---------------------   
            total = SkinTatol '取总数   
            per = Fcount '每页显示条数   
            pages = total / per '总共的页数   
               
            If pages int(pages) then   
                pages = int(pages) + 1   
            Else  
                pages = pages   
            End If  
               
            If (page * per) >= total then   
                bn = total   
            Else  
                bn = page * per   
            End If  
  
            if pages                 if page > 5 then   
                    a = page - 4   
                    b = page + 4   
                    if b > pages then b = pages   
                else   
                    a = 1   
                    b = pages   
                end if   
            else   
                if page > 5 then   
                    a = page - 4   
                    b = page + 4   
                    if b > pages then b = pages   
                else   
                    a = 1   
                    b = 9   
                end if   
            end if   
               
            '------------- start --------------------   
            pageStr = pageStr & "

"  
            pageStr = pageStr & ""  
               
            For i = a to b   
                if page = i then   
                    pageStr = pageStr & ""  
                else   
                    pageStr = pageStr & ""  
                end if   
            Next  
               
            pageStr = pageStr & ""  
            pageStr = pageStr & "

" & i & "

" & i & "

>

"  
            '------------- end --------------------   
               
               
               
            set SkinDB = conn.execute(SkinSQL)   
            if SkinDB.bof or SkinDB.eof then   
                SkinStr = SkinStr & "none"  
            else   
                web_len = 1   
                SkinStr = SkinStr & ""  
                do while not SkinDB.eof   
                    if web_len mod 4 = 0 then    
                        Bleft = ""  
                        Bright = ""  
                    elseif web_len mod 4 = 1 then   
                        Bleft = ""  
                        Bright = ""  
                    else   
                        Bleft = ""  
                        Bright = ""  
                    end if   
                        SkinStr = SkinStr & Bleft & "" & Bright   
                    web_len = web_len + 1   
                SkinDB.movenext   
                loop   
                SkinStr = SkinStr & "

"&SkinDB("Skin_Name")"

"  
            end if    
            ShowClass = pageStr & SkinStr    
End Function
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