email REGEXP "^[a-k]"? yes
email REGEXP "^[a-g]"? yes
email REGEXP "^[a-d]"? no
email REGEXP "^[e-g]"? yes, no need to ask!

DELETE FROM posts WHERE id=1234 OR 1 -- LIMIT 1

$stmt = $conn->prepare("INSERT INTO MyGuests (firstname, lastname, email) VALUES (?, ?, ?)");
$stmt->bind_param("sss", $firstname, $lastname, $email);
$stmt->execute();

$req = $bdd->prepare('INSERT INTO decisions(decision, numero, publique, date, ip) VALUES(:decision, :numero, :publique, NOW(), :ip)');
$req->execute(array(
    'decision' => $want,
    'numero' => $nombremagique,
    'publique' => $publique,
    'ip' => $ip
    ));

conn.execute("SELECT * FROM ... WHERE firstname=%s AND lastname=%s", (val1,val2))

data = {'firstname': 'Bob', 'lastname': 'Smith'}
conn.execute("SELECT * FROM ... WHERE firstname=%(firstname)s AND lastname=%(lastname)s", data)