New Member Activation

SQL practice question · Medium · Date & Time · TikTok

users has one row per user (user_id, signup_date) and activity_events has one row per event (user_id, event_date, event_name). A user is activated if they have at least one 'activate' event dated on or after their signup_date and no more than 7 days after it (signup_date + 7 days inclusive). Compute the percentage of all users in the users table who are activated. Output a single column: activation_rate_pct (rounded to 2 decimals).

Table: users

Schema of users
ColumnType
user_idINTEGER
signup_dateDATE
Sample rows of users
user_idsignup_date
12026-01-01
22026-01-01
32026-01-01
42026-01-01

Table: activity_events

Schema of activity_events
ColumnType
user_idINTEGER
event_dateDATE
event_nameTEXT
Sample rows of activity_events
user_idevent_dateevent_name
12026-01-03activate
22026-01-09activate
32026-01-05login
Expected output on the sample data
activation_rate_pct
25

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