create table sales(product text, year integer, income int);

insert into sales(product, year, income)
values
('alpha', 2020, 100),
('alpha', 2021, 120),
('alpha', 2022, 130),
('alpha', 2023, 140),
('beta', 2020, 10),
('beta', 2021, 20),
('beta', 2022, 40),
('beta', 2023, 80),
('gamma', 2020, 80),
('gamma', 2021, 75),
('gamma', 2022, 78),
('gamma', 2023, 80);
