I'd like your opinion as to whether you think this code is reasonable, or if
there is a better way to do this...

I'd like to insert data in a particular order, so that i would take this eg:
  num      val
  1        x
  2        y
  3        z

and insert "a" as number 2 (from 2 text boxes), so the resulting list would
end up:
  num      val
  1        x
  2        a
  3        y
  4        z

suedo-code so far is:
(i haven't proof read this or tested it yet...)

$num_insert = $_GET(num_insert);
$val_insert = $_GET(val_insert);
$result = mysql_query(SELECT num FROM table);
$num_rows = mysql_num_rows($result);
while($num_rows >= $num_insert){
  mysql_query(UPDATE table SET num='$num+1' val='$val');
UPDATE table SET num='$num_insert' val='$val';


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