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The ISNULL() function
The COALESCE() function
The NULLIF() function
17. Exercise 1


Okay, let's see how much you remember. Exercise 1 is waiting for you!


Show all products' names and prices. If the price is NULL, change it to N'unknown'. Make sure the latter column is named Price.

Stuck? Here's a hint!

It's a quiz. No hints this time.