67.
What is the significance of "ORDER BY emp_id DESC" in the following MySQL command?
SELECT emp_id, fname, lname
FROM person
ORDER BY emp_id DESC;

70.
Will the following SQL command produce any error?
INSERT INTO person
(person_id, fname,lname)
VALUES (1,’S’,’U’),
VALUES (2,’T’,’U’);
/* where person_id is a primary key */