insert into user 1 "user1" "user1@example.com" 10
insert into user 2 "user2" "user2@example.com" 20
insert into user 3 "user3" "user3@example.com" 30
insert into user 4 "user4" "user4@example.com" 40
delete from user where age >= 50 and id >= 5
select * from user
insert into user 5 "user5" "user5@example.com" 45
delete from user where id >= 5 and age < 30
select * from user
.exit
