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Editorial Team
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Asked: 2026-06-05T13:55:03+00:00

I am trying to work through some questions and im not sure how to

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I am trying to work through some questions and im not sure how to do the following

Q: Find the hard drive sizes that are equal among two or more PCs.

its q15 on this site.

The database scheme consists of four tables:

Product(maker, model, type)
PC(code, model, speed, ram, hd, cd, price)
Laptop(code, model, speed, ram, hd, screen, price)
Printer(code, model, color, type, price)

any pointers would be appreciated.

Edit: here is a list of all the hard drives in the pc table along with what the correct answer should be.

enter image description here

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1 Answer

  1. Editorial Team

    How about this ?

    Select PC.hd From PC
group by PC.hd
Having Count(PC.hd) >= 2
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