So, if $username is not populated (or otherwise false), but password is, you'll get:
$SQL = "SELECT FROM table WHERE AND password='pwd'
Just join your WHERE clauses together using the string, ' AND ' as the separator.
my @WHERE = ();
push @WHERE, "username = '$username'" if $username;
push @WHERE, "password = '$password'" if $password;
push @WHERE, "name = '$name'" if $name;
$SQL = "SELECT FROM table WHERE " . join ' AND ', @WHERE;
Or see my post at 'Re: (2): mysql search statement'.
dmm
You can give a man a fish and feed him for a day ...
Or, you can teach him to fish and feed him for a lifetime
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