Question

I have this function:

function updateinfos($id) {
    parametrs();
    $Log_query = mysql_query("SELECT max(recent) FROM song") or die(mysql_error());
    $Res_user = mysql_fetch_array($Log_query);
    $max = $Res_user[0] + 1;
    $Log_query2 = mysql_query("UPDATE song SET recent = '$max' AND number = number + 1 WHERE id = '$id'") or die(mysql_error());
}

I have a problem in the query update, because it doesn’t work and I don’t know why.

Answer 1

You have the syntax for UPDATE wrong.

UPDATE song
SET   recent = '$max' AND number = number + 1
WHERE id = '$id'

By using AND, you’re making a boolean expression, not setting the value for two columns.

You should write an UPDATE statement that changes multiple columns like this:

UPDATE song
SET   recent = '$max',
      number = number + 1
WHERE id = '$id'

In other words, use a comma, not AND.