INSERT INTO customers (first_name, last_name, gender, phone_number) VALUES ('Chris','Martin','M','01123147789'),('Emma','Law','F','01123439899'),('Mark','Watkins','M','01174592013'),('Daniel','Williams','M',NULL),('Sarah','Taylor','F','01176348290'),('Katie','Armstrong','F','01145787353'),('Michael','Bluth','M','01980289282'),('Kat','Nash','F','01176987789'),('Buster','Bluth','M','01173456782'),('Charlie',NULL,'F','01139287883'),('Lindsay','Bluth','F','01176923804'),('Harry','Johnson','M',NULL),('John','Smith','M','01174987221'),('John','Taylor','M',NULL),('Emma','Smith','F','01176984116'),('Gob','Bluth','M','01176985498'),('George','Bluth','M','01176984303'),('Lucille','Bluth','F','01198773214'),('George','Evans','M','01174502933'),('Emily','Simmonds','F','01899284352'),('John','Smith','M','01144473330'),('Jennifer',NULL,'F',NULL),('Toby','West','M','01176009822'),('Paul','Edmonds','M','01966947113');