MySQL not decrementing values

Question

I can't get the values in the table Accounts to decrement when I try to delete a post. The values I would like to decrement are "PostCount", "Likes Count" and "CommentsCount". Currently only the "PostCount" works.

Please can you tell me what I am doing wrong:

$arg = mysql_query("SELECT `numberOfLikes` FROM Posts WHERE `id` = '$postID'") or die(mysql_error());

    $query = mysql_query("SELECT * FROM Likes WHERE `postID` = '$postID'");
    while ($row = mysql_fetch_assoc($query)) {
        $b = $row['accountID'];
        mysql_query("UPDATE Accounts SET `numberOfLikes` = (`numberOfLikes` - 1) WHERE `id` = '$b'");
    }
    $arg = mysql_query("SELECT `numberOfComments` FROM Posts WHERE `id` = '$postID'");
    $query = mysql_query("SELECT * FROM Posts WHERE `id` = '$postID'");
    while($row = mysql_fetch_assoc($arg)) {
        $b = $row['accountID'];
        mysql_query("UPDATE Accounts SET `CommentsCount` = (`CommentsCount` - 1) WHERE `id` = '$b'");
    }
    $arg = mysql_query("SELECT `PostCount` FROM Accounts WHERE `id` = '$accountID'");
    while ($row = mysql_fetch_assoc($arg)) {
        mysql_query("UPDATE Accounts SET `PostCount` = (`PostCount` - 1) WHERE `id` = '$accountID'");
    }
    mysql_query("DELETE FROM Likes WHERE `postID` = '$postID'");
    mysql_query("DELETE FROM Comments WHERE `postID` = '$postID'");
    mysql_query("DELETE FROM Posts WHERE `id` = '$postID' AND `accountID` = '$accountID'") or die(mysql_error());
    exit("Deleted post");

Answer 1

I re-coded my if statement containing the code I posted and it is now working perfectly:

mysql_query("UPDATE Accounts SET `PostCount` = (`PostCount` - 1) WHERE `id` = '$accountID'");
        $query = mysql_query("SELECT * FROM Likes WHERE `postID` = '$postID'") or die(mysql_error());
        while($row = mysql_fetch_assoc($query)) {
            $accID = $row['accountID'];
            mysql_query("UPDATE Accounts SET `Likes Count` = (`Likes Count` - 1) WHERE `id` = '$accID'");
        }
        $query = mysql_query("SELECT * FROM Comments WHERE `postID` = '$postID'");
        while($row = mysql_fetch_assoc($query)) {
            $accID = $row['accountID'];
            mysql_query("UPDATE Accounts SET `CommentsCount` = (`CommentsCount` - 1) WHERE `id` = '$accID'");
        }
        mysql_query("DELETE FROM Likes WHERE `postID` = '$postID'");
        mysql_query("DELETE FROM Comments WHERE `postID` = '$postID'");
        mysql_query("DELETE FROM Posts WHERE `id` = '$postID' AND `accountID` = '$accountID'") or die(mysql_error());
        exit("Deleted post");