what courses did bart get grades in
# course_id in grades -- id in courses -> what teacher ids taught those courses
# teacher_id in courses -- id in teachers -> what are the names of those teachers
# How many total students has Ms. Krabappel taught, and what are their names?
try {
$db = new PDO("mysql:dbname=simpsons;host=localhost;charset=utf8", "homer", "d0ughnut");
$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
$rows = $db->query("SELECT * from students WHERE name LIKE 'l%'");
$rows->rowCount();
?>
Sorry, a database error occurred.
(Error details: getMessage() ?>)