数据库分页

数据库分页收藏

新一篇: 存储过程分页 |

CREATE Proc p_show
@QueryStr nvarchar(4000),           --表名、视图名、查询语句
@PageSize int=10,   --每页的大小(行数)
@PageCurrent int=1,   --要显示的页
@FdShow nvarchar (4000)='', --要显示的字段列表,如果查询结果有标识字段,需要指定此值,且不包含标识字段
@FdOrder nvarchar (1000)='', --排序字段列表

@sql varchar(4000)='',
@getcount int=0 out -- 记录数

as
begin

exec(@Sql)

end

begin
declare @FdName nvarchar(250) --表中的主键或表、临时表中的标识列名
,@Id1 varchar(20),@Id2 varchar(20) --开始和结束的记录号
,@Obj_ID int --对象ID
--表中有复合主键的处理
declare @strfd nvarchar(2000) --复合主键列表
,@strjoin nvarchar(4000) --连接字段
,@strwhere nvarchar(2000) --查询条件

select @Obj_ID=object_id(@QueryStr)
,@FdShow=case isnull(@FdShow,'') when '' then ' *' else ' '+@FdShow end
,@FdOrder=case isnull(@FdOrder,'') when '' then '' else ' order by '+@FdOrder end
,@QueryStr=case when @Obj_ID is not null then ' '+@QueryStr else ' ('+@QueryStr+') a' end

--如果显示第一页，可以直接用top来完成
if @PageCurrent=1
begin
select @Id1=cast(@PageSize as varchar(20))
exec('select top '+@Id1+@FdShow+' from '+@QueryStr+@FdOrder)
return
end

--如果是表,则检查表中是否有标识更或主键
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 id=@Obj_ID and status=0x80
if @@rowcount=0   --如果表中无标识列,则检查表中是否有主键
begin
  if not exists(select 1 from sysobjects where parent_obj=@Obj_ID and xtype='PK')
   goto lbusetemp  --如果表中无主键,则用临时表处理

  select @FdName=name from syscolumns where id=@Obj_ID 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 parent_obj=@Obj_ID
   )))
  if @@rowcount>1  --检查表中的主键是否为复合主键
  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 id=@Obj_ID 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 parent_obj=@Obj_ID
    )))
   select @strfd=substring(@strfd,2,2000)
    ,@strjoin=substring(@strjoin,5,4000)
    ,@strwhere=substring(@strwhere,5,4000)
   goto lbusepk
  end
end
end
else
goto lbusetemp

/*--使用标识列或主键为单一字段的处理方法--*/
lbuseidentity:
exec('select top '+@Id1+@FdShow+' from '+@QueryStr
  +' where '+@FdName+' not in(select top '
  +@Id2+' '+@FdName+' from '+@QueryStr+@FdOrder
  +')'+@FdOrder
  )
return

/*--表中有复合主键的处理方法--*/
lbusepk:
exec('select '+@FdShow+' from(select top '+@Id1+' a.* from
  (select top 100 percent * from '+@QueryStr+@FdOrder+') a
  left join (select top '+@Id2+' '+@strfd+'
  from '+@QueryStr+@FdOrder+') b on '+@strjoin+'
  where '+@strwhere+') a'
  )
return

/*--用临时表处理的方法--*/
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 '+@FdName+'=identity(int,0,1),'+@FdShow+'
into #tb from '+@QueryStr+@FdOrder+'
select '+@FdShow+' from #tb where '+@FdName+' between '
+@Id1+' and '+@Id2
)
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"; // 分页使用的存储过程名称

  public static string QueryStr_Parm  = "@QueryStr" ;  // 向分页存储过程里传入的 Sql 语句
  public static string Sql_Parm   = "@Sql" ;   // 检索行数
  public static string PageSize_Parm  = "@PageSize" ;  // 向分页存储过程里传入的每页显示行数的值
  public static string PageCurrent_Parm = "@PageCurrent" ; // 当前显示的页码

public static string FdShow_Parm = "@FdShow" ; // 传入返回时要显示的列，用逗号隔开。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 ;
}<% 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 %><% 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 %>