SQL分頁存儲過程及其應用

CREATE Proc p_show
@QueryStr nvarchar(4000),           --表名、視圖名、查詢語句
@PageSize int=10,   --每頁的大小(行數)
@PageCurrent int=1,   --要顯示的頁
@FdShow nvarchar (4000)='', --要顯示的字段列表,如果查詢結果有標識字段,需要指定此值,且不包含標識字段
@FdOrder nvarchar (1000)='', --排序字段列表
@sql varchar(4000)='',
@getcount int=0 out   -- 記錄數
as
begin

exec(@Sql)

end
begin
declare @FdName nvarchar(250) --表中的主鍵或表、臨時表中的標識列名
,@Id1 varchar(20),@Id2 varchar(20) --開始和結束的記錄號
,@Obj_ID int    --對象ID
--表中有複合主鍵的處理
declare @strfd nvarchar(2000) --複合主鍵列表
,@strjoin nvarchar(4000) --連接字段
,@strwhere nvarchar(2000) --查詢條件

select @Obj_ID=object_id(@QueryStr)
,@FdShow=case isnull(@FdShow,'') when '' then ' *' else ' [email='+@FdShow]'+@FdShow[/email] end
,@FdOrder=case isnull(@FdOrder,'') when '' then '' else ' order by [email='+@FdOrder]'+@FdOrder[/email] end
,@QueryStr=case when @Obj_ID is not null then ' [email='+@QueryStr]'+@QueryStr[/email] else ' ([email='+@QueryStr+']'+@QueryStr+'[/email]) a' end
--如果顯示第一頁，可以直接用top來完成
if @PageCurrent=1
begin
select @Id1=cast(@PageSize as varchar(20))
exec('select top [email='+@Id1+@FdShow+']'+@Id1+@FdShow+'[/email] from [email='+@QueryStr+@FdOrder]'+@QueryStr+@FdOrder[/email])
return
end
--如果是表,則檢查表中是否有標識更或主鍵
if @Obj_ID is not null and objectproperty(@Obj_ID,'IsTable')=1
begin
select @Id1=cast(@PageSize as varchar(20))
  ,@Id2=cast((@PageCurrent-1)*@PageSize as varchar(20))
select @FdName=name from syscolumns where [email=id=@Obj_ID]id=@Obj_ID[/email] and status=0x80
if @@rowcount=0   --如果表中無標識列,則檢查表中是否有主鍵
begin
  if not exists(select 1 from sysobjects where [email=parent_obj=@Obj_ID]parent_obj=@Obj_ID[/email] and xtype='PK')
   goto lbusetemp  --如果表中無主鍵,則用臨時表處理
  select @FdName=name from syscolumns where [email=id=@Obj_ID]id=@Obj_ID[/email] and colid in(
   select colid from sysindexkeys where @Obj_ID=id and indid in(
    select indid from sysindexes where @Obj_ID=id and name in(
     select name from sysobjects where xtype='PK' and [email=parent_obj=@Obj_ID]parent_obj=@Obj_ID[/email]
   )))
  if @@rowcount>1  --檢查表中的主鍵是否爲複合主鍵
  begin
   select @strfd='',@strjoin='',@strwhere=''
   select @strfd=@strfd+',['+name+']'
    ,@strjoin=@strjoin+' and a.['+name+']=b.['+name+']'
    ,@strwhere=@strwhere+' and b.['+name+'] is null'
    from syscolumns where [email=id=@Obj_ID]id=@Obj_ID[/email] and colid in(
    select colid from sysindexkeys where @Obj_ID=id and indid in(
     select indid from sysindexes where @Obj_ID=id and name in(
      select name from sysobjects where xtype='PK' and [email=parent_obj=@Obj_ID]parent_obj=@Obj_ID[/email]
    )))
   select @strfd=substring(@strfd,2,2000)
    ,@strjoin=substring(@strjoin,5,4000)
    ,@strwhere=substring(@strwhere,5,4000)
   goto lbusepk
  end
end
end
else
goto lbusetemp
/*--使用標識列或主鍵爲單一字段的處理方法--*/
lbuseidentity:
exec('select top [email='+@Id1+@FdShow+']'+@Id1+@FdShow+'[/email] from [email='+@QueryStr]'+@QueryStr[/email]
  +' where [email='+@FdName+']'+@FdName+'[/email] not in(select top '
  [email=+@Id2+']+@Id2+'[/email] [email='+@FdName+']'+@FdName+'[/email] from [email='+@QueryStr+@FdOrder]'+@QueryStr+@FdOrder[/email]
  +')'+@FdOrder
  )
return
/*--表中有複合主鍵的處理方法--*/
lbusepk:  
exec('select [email='+@FdShow+']'+@FdShow+'[/email] from(select top [email='+@Id1+']'+@Id1+'[/email] a.* from
  (select top 100 percent * from [email='+@QueryStr+@FdOrder+']'+@QueryStr+@FdOrder+'[/email]) a
  left join (select top [email='+@Id2+']'+@Id2+'[/email] [email='+@strfd+']'+@strfd+'[/email]
  from [email='+@QueryStr+@FdOrder+']'+@QueryStr+@FdOrder+'[/email]) b on [email='+@strjoin+']'+@strjoin+'[/email]
  where [email='+@strwhere+']'+@strwhere+'[/email]) a'
  )
return
/*--用臨時表處理的方法--*/
lbusetemp:  
select @FdName='[ID_'+cast(newid() as varchar(40))+']'
,@Id1=cast(@PageSize*(@PageCurrent-1) as varchar(20))
,@Id2=cast(@PageSize*@PageCurrent-1 as varchar(20))
exec('select [email='+@FdName+'=identity(int,0,1),'+@FdShow+']'+@FdName+'=identity(int,0,1),'+@FdShow+'[/email]
  into #tb from [email='+@QueryStr+@FdOrder+']'+@QueryStr+@FdOrder+'[/email]
select [email='+@FdShow+']'+@FdShow+'[/email] from #tb where [email='+@FdName+']'+@FdName+'[/email] between '
[email=+@Id1+']+@Id1+'[/email] and [email='+@Id2]'+@Id2[/email]
)
end
GO

asp中使用方法:
<%
page = trim(request.QueryString("page"))
if page="" then
ipage = 1
else
ipage = cint(page)
end if
pagesize = 30
set rs = server.CreateObject("adodb.recordset")
sqlstr="select top 1000000 id,lovedress,chattoolnote,email from [5years_vote]  order by id desc "
sqlstr1="select count(1) from [5years_vote]"
sql="p_show '"&sqlstr&"',"&pagesize&","&ipage
'Response.Write sql
'Response.End
rs.Open sql, conn, 3,3
'Response.Write sqlstr
'Response.End
%>


c#:

public DataSet GetResumeListBox(int pagesize,int PageCurrent)
  {
   SqlDataAdapter sda=new SqlDataAdapter() ;
   DataSet ds =new DataSet();
   sda.SelectCommand = (new DataAccess.DbCFG()).GetCommand();
  
            string sql="SELECT top "+DbCFG.TopCount+" dbo.BaseInfo.*,dbo.ApplyJob.id as aid,jobinfo.jobname FROM dbo.ApplyJob RIGHT OUTER JOIN dbo.BaseInfo ON dbo.ApplyJob.rid = dbo.BaseInfo.id left join jobinfo on ApplyJob.jobid=jobinfo.id where dbo.ApplyJob.JobId in ("+positionid+") and ApplyJob.ApplyState='0' and Iflow='0' ";
   sql+=" order by dbo.ApplyJob.sendtime DESC";
   string sql1="SELECT Count(1) FROM dbo.ApplyJob RIGHT OUTER JOIN dbo.BaseInfo ON dbo.ApplyJob.rid = dbo.BaseInfo.id left join jobinfo on ApplyJob.jobid=jobinfo.id where dbo.ApplyJob.JobId in ("+positionid+") and ApplyJob.ApplyState='0' and Iflow='0' ";
   sda.SelectCommand.Parameters[DataAccess.DbCFG.QueryStr_Parm].Value  = sql ;
   sda.SelectCommand.Parameters[DataAccess.DbCFG.Sql_Parm].Value    = sql1 ;
   sda.SelectCommand.Parameters[DataAccess.DbCFG.PageSize_Parm].Value  = pagesize;
   sda.SelectCommand.Parameters[DataAccess.DbCFG.PageCurrent_Parm].Value  = PageCurrent ;
   sda.Fill(ds) ;
   //data=ds.Tables[1];
   return ds ;
  }

private SqlCommand SelectCommand ;
  public static string P_Show = "P_Show";      // 分頁使用的存儲過程名稱
  public static string QueryStr_Parm  = "@QueryStr" ;  // 向分頁存儲過程裏傳入的 Sql 語句
  public static string Sql_Parm   = "@Sql" ;   // 檢索行數
  public static string PageSize_Parm  = "@PageSize" ;  // 向分頁存儲過程裏傳入的 每頁顯示行數的值
  public static string PageCurrent_Parm = "@PageCurrent" ; // 當前顯示的頁碼
  public static string FdShow_Parm  = "@FdShow" ;   // 傳入返回時要顯示的列，用逗號隔開。例："col1,col2"
  public static string FdOrder_Parm  = "@FdOrder" ;  // 排序
  public SqlCommand GetCommand()
  {
   if ( SelectCommand == null )
   {
    SelectCommand = new SqlCommand( P_Show , new SqlConnection(DbCFG.ConnectionString) ) ;
    SelectCommand.CommandType = CommandType.StoredProcedure ;
    SelectCommand.Parameters.Add(new SqlParameter(QueryStr_Parm, SqlDbType.NVarChar, 4000 )) ;
    SelectCommand.Parameters.Add(new SqlParameter(Sql_Parm, SqlDbType.NVarChar, 4000 )) ;
    SelectCommand.Parameters.Add(new SqlParameter(PageSize_Parm , SqlDbType.Int)) ;
    SelectCommand.Parameters.Add(new SqlParameter(PageCurrent_Parm , SqlDbType.Int)) ;
   }
   return SelectCommand ;
  }