SQL Window Ranking by Cohort | Dataford Interview Questions

Write a SQL query using window functions to rank users by engagement within each cohort for NeuroFlow reporting.

Use the provided users and engagement_events data. Include users with no matching events, treat their engagement as zero, and allow tied users to share a rank.

Output

One row per user with user_id, cohort, total_engagement, and engagement_rank.
Include all users and order by cohort, rank ascending, then user ID ascending.

Schema

users

Column	Type	Description
user_idPK	INT	Unique user identifier
display_name	VARCHAR(100)	User display name
cohort	VARCHAR(30)	User reporting cohort

engagement_events

Column	Type	Description
event_idPK	INT	Unique engagement event identifier
user_id	INT	User associated with the event
engagement_score	INT	Engagement points recorded for the event

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Problem