Add 1 to a field

Question

How do I turn the following 2 queries into 1 query

$sql    = \"SELECT level FROM skills WHERE id = $id LIMIT 1;\";
$result = $db->sql_query($sql);
$level  = (         


        

Answer 1

$sql = "UPDATE skills SET level = level + 1 WHERE id = $id";

I just hope you are properly sanitising $id elsewhere in your code!