Mysql syntax error

I'm trying to brush up on connecting and interacting with a database and in the tutorial I was directed to write the following:

<?php
    //Include Connection//
    require 'connect.inc.php';

    $query = "SELECT 'food', 'calories' FROM 'food' ORDER BY 'id'";
            
    if($query_run = mysql_query($query)){
        echo 'Query was successful!';
    } else {
        echo mysql_error();
    }

?>

But, I get the following error:

"You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''food' ORDER BY 'id'' at line 1"

Whereas he gets "Query was successful."

I went over mind and compared it to his practically letter by letter and I can't figure it out. Anyone mind pointing me in the right direction? lol

Unless the database/table/field name is a MySQL reserved word, it doesn't need to be enclosed in anything. And then if it is a reserved word, you'd use `backticks`, not 'single quotes'.

Thank you pikachu!

You guys are really knowledgeable! 

That's why we get paid the big bucks. Or nothing. Whichever is less . . .