Introduction
Nested CTEs
6. Simple nested CTEs – exercise
Summary

Instruction

Excellent! Let's do one more exercise of this kind.

Exercise

Count the maximal AmountEarned on a given day for each city. Then, calculate the average maximal amount across all cities on a given day. Finally, count the number of days on which that average maximum amount exceeded \$1700. Name this column BigAvgNumber.

Stuck? Here's a hint!

Use MAX(AmountEarned) in the first CTE, then use AVG on that aggregate result. In the outer query, use COUNT.