+------------------+---------+ | Column Name | Type | +------------------+---------+ | user_id | int | | activity_date | date | | activity_type | varchar | | activity_duration| int | +------------------+---------+ (user_id, activity_date, activity_type) is the unique key for this table. activity_type is one of ('free_trial', 'paid', 'cancelled'). activity_duration is the number of minutes the user spent on the platform that day. Each row represents a user's activity on a specific date.

+---------+---------------+---------------+-------------------+ | user_id | activity_date | activity_type | activity_duration | +---------+---------------+---------------+-------------------+ | 1 | 2023-01-01 | free_trial | 45 | | 1 | 2023-01-02 | free_trial | 30 | | 1 | 2023-01-05 | free_trial | 60 | | 1 | 2023-01-10 | paid | 75 | | 1 | 2023-01-12 | paid | 90 | | 1 | 2023-01-15 | paid | 65 | | 2 | 2023-02-01 | free_trial | 55 | | 2 | 2023-02-03 | free_trial | 25 | | 2 | 2023-02-07 | free_trial | 50 | | 2 | 2023-02-10 | cancelled | 0 | | 3 | 2023-03-05 | free_trial | 70 | | 3 | 2023-03-06 | free_trial | 60 | | 3 | 2023-03-08 | free_trial | 80 | | 3 | 2023-03-12 | paid | 50 | | 3 | 2023-03-15 | paid | 55 | | 3 | 2023-03-20 | paid | 85 | | 4 | 2023-04-01 | free_trial | 40 | | 4 | 2023-04-03 | free_trial | 35 | | 4 | 2023-04-05 | paid | 45 | | 4 | 2023-04-07 | cancelled | 0 | +---------+---------------+---------------+-------------------+

+---------+--------------------+-------------------+ | user_id | trial_avg_duration | paid_avg_duration | +---------+--------------------+-------------------+ | 1 | 45.00 | 76.67 | | 3 | 70.00 | 63.33 | | 4 | 37.50 | 45.00 | +---------+--------------------+-------------------+