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
update user set email = "user4@example.xyz" where id = 4 or name = "user4"
delete from user where email = "user4@example.xyz"
select * from user
.exit
