Dear All: I was trying to insert some numbers into an Access table. There were already some numbers in this table. I did not want to insert those numbers that already in the table. So I first read the number into an array named @IDnumber. Then I use the following code, 
............
    $ua=new LWP::UserAgent;
      $ua->timeout ([180]);
      $request = new HTTP::Request('GET', $url);
      $response=$ua->request($request);
      if (!($response->is_success)) {
          print " Error can not load! \n  ";
      }

.........

NEXTLINE1:     while ($CONTENDS=~ /\d{10}/g) {
        $match=$&;
        $CONTENDS=$';        
        $count=0;
        while ($count<=@IDnumber) {
        if ($match == $IDnumber[$count]){
        goto NEXTLINE1;
          }
    $count++;
              }    
        push  (@IDnumber1, $match);           
            }
............
   for ($Inde=0;$Inde<=@IDnumber1;$Inde++){
   my $match=$IDnumber1[$Inde];
  $sqlinsert="INSERT INTO $tab[$loop] VALUES('$match')";
                 $rc=$db->Sql($sqlinsert);
                die qq(SQL fail "$rc":), $db->Error(),qq(n) if $rc;  
   }

[download]
But I did not succeed. Duplicated numbers were inserted into the table. Could anybody help me to figure out whats wrong with my code? Thank you very much in advance. .... Luoina

In reply to How do I avoid inserting duplicate numbers into an Access table? by luoina

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