Question

I need to delete some data from mysql. I know a bit of php but get really lost with mysql and really don’t want to mess this up… I did make a .sql backup but I need to get this right. That’s why i’m posting the question here. I know I will get some crap for not trying myself and posting my code here but to be hosnest.. this is as far as I got before I got stuck:

<?php
$con = mysql_connect("localhost","USERNAME","PASSWORD");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

mysql_select_db("DATABASE", $con);

$result = mysql_query("SELECT * FROM subscriber");

while($row = mysql_fetch_array($result))
  {
  echo $row['mail'] . " " . $row['snid'];
  echo "<br />";
  }

mysql_close($con);
?>

What i’m really trying to do is this:

• Locate all rows where status = 0 the in the table called subscription and get the field snid (which is an integer)
• Then go to the table called subscriber and delete the row with the matching snid (also a field in this tables row)
• Then go back to subscription and delete the original matched row

Does this make sence?…. I’ve done my own head in just trying to explain it 🙁

Answer 1

To do what you’ve asked, you only need 1 query:

delete subscriber, subscription from subscriber,subscription where subscription.status = 0 and subscription.snid=subscriber.snid;