ปัญหา การสร้างกราฟเส้น คือผมต้องการที่จะเอาข้อมูลจาก ฐานข้อมูล (Oracle) มาขึ้นกราฟเส้นหนะครับ

<?php
include ("../connect.php");
include ("../jpgraph.php");
include ("../jpgraph_line.php");



$sql = "select  a_service.a_enddate-a_service.a_startdate
from a_service, a_channel
where a_service.a_id=a_channel.a_id and a_channel='3333'
and a_service.a_status='C'
order by a_service.a_enddate";
$statement = ociparse($conn,$sql);
ociexecute($statement, OCI_DEFAULT);
ocifetch($statement);
$v_3333 = ociresult($statement,1);



$sql = "select  a_service.a_enddate-a_service.a_startdate
from a_service, a_channel
where a_service.a_id=a_channel.a_id and a_channel='9999'
and a_service.a_status='C'
order by a_service.a_enddate";
$statement = ociparse($conn,$sql);
ociexecute($statement, OCI_DEFAULT);
ocifetch($statement);
$v_9999 = ociresult($statement,1);


$sql = "select  a_service.a_enddate-a_service.a_startdate
from a_service, a_channel
where a_service.a_id=a_channel.a_id and a_channel='2222'
and a_service.a_status='C'
order by a_service.a_enddate";
$statement = ociparse($conn,$sql);
ociexecute($statement, OCI_DEFAULT);
ocifetch($statement);
$v_2222 = ociresult($statement,1);



$sql = "select  a_service.a_enddate-a_service.a_startdate
from a_service, a_channel
where a_service.a_id=a_channel.a_id and a_channel='1111'
and a_service.a_status='C'
order by a_service.a_enddate";
$statement = ociparse($conn,$sql);
ociexecute($statement, OCI_DEFAULT);
ocifetch($statement);
$v_1111 = ociresult($statement,1);



$sql = "select  a_service.a_enddate-a_service.a_startdate
from a_service, a_channel
where a_service.a_id=a_channel.a_id and a_channel='4444'
and a_service.a_status='C'
order by a_service.a_enddate";
$statement = ociparse($conn,$sql);
ociexecute($statement, OCI_DEFAULT);
ocifetch($statement);
$v_4444 = ociresult($statement,1);


$a_3333    = $v_3333*24*60;
$a_9999    = $v_9999*24*60;
$a_2222    = $v_2222*24*60;
$a_1111    = $v_1111*24*60;
$a_4444    = $v_4444*24*60;

$ydata1 [0]  = "$a_3333";
$ydata2 [1]  = "$a_9999";
$ydata3 [2]  = "$a_2222";
$ydata4 [3]  = "$a_1111";
$ydata5 [4]  = "$a_4444";

$graph = new Graph(600,350,"auto");	
$graph->SetScale("textlin");

$graph->yaxis->scale->SetGrace(50);

$graph->title->Set("Line graph Compare"); 
  $graph->img->SetMargin(50,20,20,40);    
  $graph->xaxis->SetTitle("Date","center"); 
  $graph->yaxis->SetTitleMargin(30);      
  $graph->yaxis->title->Set("Time (Minute)");  
  
$graph->title->SetFont(FF_FONT1,FS_BOLD);
  

	
$lineplot1=new LinePlot($ydata1);
$lineplot1->SetColor("blue");
$lineplot1->SetLegend('3333');
$graph->Add($lineplot1);

$lineplot2=new LinePlot($ydata2);
$lineplot2->SetColor("red");
$lineplot2->SetLegend('9999');
$graph->Add($lineplot2);

$lineplot3=new LinePlot($ydata3);
$lineplot3->SetColor("yellow");
$lineplot3->SetLegend('2222');
$graph->Add($lineplot3);

$lineplot4=new LinePlot($ydata4);
$lineplot4->SetColor("green");
$lineplot4->SetLegend('1111');
$graph->Add($lineplot4);

$lineplot5=new LinePlot($ydata5);
$lineplot5->SetColor("black");
$lineplot5->SetLegend('4444');
$graph->Add($lineplot5);

$graph->Stroke();

?>