SQL or Power Query Aggregation

MediumSQL & Data Manipulation00:00

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Your question is SQL or Power Query Aggregation. Take a moment with it on the right.

Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).

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Can you explain a time you used SQL or Power Query to solve a complex data aggregation problem?