Rolling Average with SQL Windows | Dataford Interview Questions

Your question is Rolling Average with SQL Windows. Start with the requirements and the two tables on the right.

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Problem

RpmGlobal wants to monitor engagement with Enterprise Planning. Calculate each eligible user's rolling average of daily user-initiated activity for the reporting period 2025-02-01 through 2025-02-08.

Requirements

Include only users whose account_status is active and whose product_area is Enterprise Planning.
Count only model_run, schedule_update, and dashboard_view events. Treat dates without qualifying events as zero activity.
Return one row per eligible user per calendar date, with daily_activity and a 30-calendar-day rolling average, including the current date.
Round the rolling average to four decimal places and sort by user, then date.

Schema

users

Column	Type	Description
user_idPK	INTEGER	Unique user identifier
full_name	VARCHAR(100)	User's display name
account_status	VARCHAR(20)	Account state, such as active or inactive
product_area	VARCHAR(100)	RpmGlobal product area available to the user

activity_events

Column	Type	Description
activity_idPK	INTEGER	Unique activity event identifier
user_id	INTEGER	User associated with the activity event
occurred_at	TIMESTAMP	Timestamp when the event occurred
activity_type	VARCHAR(50)	Type of recorded product activity