Exercise #18

Find the makers of the cheapest color printers. Result set: maker, price.

Find two mistakes in the following solution to this task:

  1. SELECT c.maker, a.priceA price
  2. FROM (SELECT MIN(price) priceA
  3. FROM Printer
  4. WHERE color ='y'
  5. ) a INNER JOIN
  6. Printer b ON a.priceA = b.price INNER JOIN
  7. Product c ON b.model = c.model;


To solve the problem on SQL-EX.RU

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