Slide 20
Slide 20 text
flashback example, pseudo code
insert(1, 'a')
insert(2, 'b')
insert(3, 'c')
update(2, 'b')->(2, 'second')
update(3, 'c')->(3, 'third')
insert(4, 'd')
delete(1, 'a')
insert(1, 'a')
delete(4, 'd')
update(3, 'third')->(3, 'c')
update(2, 'second')->(2, 'b')
delete(3, 'c')
delete(2, 'b')
delete(1, 'a')