3. Above-Average Spenders
MediumCTEsmultiple CTEsaggregate then compare
Common Table Expressions let you name intermediate results and chain them. Here you need two: one for the global picture, one per customer.
Task: find customers whose average order amount is greater than the
global average order amount across all orders. Return customer and their
rounded average cust_avg (2 decimals), ordered by cust_avg descending.
Tables
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Expected outputrows must come back in this order
Computing expected output…
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