Question

Relations:

Product(maker, model, type) 

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

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

Printer(model,price, color, price)

I am trying to find the laptops that have a speed slower than that of any pc.

What I have tried:

SELECT model FROM laptop WHERE laptop.speed < 
(SELECT speed FROM pc WHERE pc.speed < all);

I am trying to get the slowest speed in the pc relation and compare that speed to the speeds of the laptops. Which I figure would give me the relation I am looking for. I just keep getting a syntax error.

Answer 1

SELECT model FROM laptop WHERE laptop.speed < (SELECT MIN(speed) FROM pc)

Learn more about the MIN() function here.