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Introduction
Function AVG
Functions SUM, MAX, MIN
Review
35. Exercise 3

Instruction

Wow, correct again! Exercise 3 on its way.

Exercise

For each language combination in table project (e.g. EN to ES, ES to EN, DE to PL etc.) show lang_from, lang_to and the average price in this combination (as avg_price). When calculating the average, treat NULL values as 0.