Problem
Write a SQL query to calculate the 7-day rolling average of sales for every product category in our database at Amplify.
Practicing as: Data Scientist interview at AmplifyHi, I'll play your Amplify interviewer for the Data Scientist role. Candidates describe these interviews as mixed and moderately difficult, so expect me to be professional and fair. Take your time with the question above and answer like we're in the room.
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