Exercise #18

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

Find two mistakes in the following solution to this task:

SELECT c.maker, a.priceA price
FROM (SELECT MIN(price) priceA
     FROM Printer
     WHERE color ='y'
     ) a
    INNER JOIN Printer b ON a.priceA = b.price
    INNER JOIN Product c ON b.model = c.model;

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[[ error ]]

[[ column ]]
NULL [[ value ]]

T&S

To solve the problem on SQL-EX.RU

#Mistakes #Printer #Inner Join #Exercises 18

Exercise #17 Exercise #20