Question: This query works but is doing something unnecessary. Suggest a way to improve the way that this query is written, so it is no longer

This query works but is doing something unnecessary. Suggest a way to improve the way that this query is written, so it is

This query works but is doing something unnecessary. Suggest a way to improve the way that this query is written, so it is no longer doing the unnecessary thing. Explain why your suggestion helps.

-- Get all of the product models that are produced by B.

SELECT DISTINCT model FROM Product WHERE maker = 'B';

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

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