In the homework:
Chapter 3: Core Aggregation - Combining Information
Lab - Using $lookup
Using this as a solution:
I get an answer (maximum value for AlCnt), but I am told this is wrong. Why is that? I hope someone can’t point out my mistake?
Second and side question:
This homework has 3 possible answers and 3 trials.
Trying all possibilities without even thinking will inevitably lead to the solution. Am I missing something? (For example because my browser wouldn’t show it all?)