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SQL Practice Set in PostgreSQL

Introduction
Exercises
6. The most bored cat

Instruction

Incredible! You're almost at the finish line. Keep going.

Exercise

Select the names of all male cats that don't have a favorite toy – that is, the value of the field fav_toy is NULL for these cats.

Stuck? Here's a hint!

When looking for unknown values we can use the IS NULL clause like this:

AND fav_toy IS NULL