Exercise 2.5.1: Express the following constraints about the relations of Exercise 2.3.1, reproduced here:

Product(maker, model, type)

PC(model, speed, ram, hd, price)

Laptop(model, speed, ram, hd, screen, price)

Printer(model, color, type, price)

e) Write the following query in Sqlite

If a laptop has a larger main memory than a PC, then the laptop must also have a higher price than the PC.