savepoint start_point1;

insert into day_week values(6,'субота');

SAVEPOINT start_point2;

insert into day_week values(7,'неділля');

SAVEPOINT start_point3;

delete from day_week;

rollback to SAVEPOINT start_point2;

rollback to SAVEPOINT start_point1;

insert into day_week values(1, 'Понеділок');
insert into day_week values(2, 'Вівторок');
insert into day_week values(3, 'Середа');
insert into day_week values(4, 'Четвер');
insert into day_week values(5, 'Пятниця');
delete from day_week
where id in (1,2,3);

savepoint start_point4;

insert into day_week values(7, 'неділля');

commit;

rollback to savepoint start_point4;