+------------------+---------+
| 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.

Input:

UserActivity table:

+---------+---------------+---------------+-------------------+
| 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                 |
+---------+---------------+---------------+-------------------+

Output:

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

Explanation:

• User 1:
  • Had 3 days of free trial with durations of 45, 30, and 60 minutes.
  • Average trial duration: (45 + 30 + 60) / 3 = 45.00 minutes.
  • Had 3 days of paid subscription with durations of 75, 90, and 65 minutes.
  • Average paid duration: (75 + 90 + 65) / 3 = 76.67 minutes.
• User 2:
  • Had 3 days of free trial with durations of 55, 25, and 50 minutes.
  • Average trial duration: (55 + 25 + 50) / 3 = 43.33 minutes.
  • Did not convert to a paid subscription (only had free_trial and cancelled activities).
  • Not included in the output because they didn't convert to paid.
• User 3:
  • Had 3 days of free trial with durations of 70, 60, and 80 minutes.
  • Average trial duration: (70 + 60 + 80) / 3 = 70.00 minutes.
  • Had 3 days of paid subscription with durations of 50, 55, and 85 minutes.
  • Average paid duration: (50 + 55 + 85) / 3 = 63.33 minutes.
• User 4:
  • Had 2 days of free trial with durations of 40 and 35 minutes.
  • Average trial duration: (40 + 35) / 2 = 37.50 minutes.
  • Had 1 day of paid subscription with duration of 45 minutes before cancelling.
  • Average paid duration: 45.00 minutes.

The result table only includes users who converted from free trial to paid subscription (users 1, 3, and 4), and is ordered by user_id in ascending order.