Notification Deliveries
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We’re given two tables, a table of notification_deliveries and a table of users with created and purchase conversion dates. If the user hasn’t purchased then the conversion_date column is NULL.
Write a query to get the distribution of total push notifications before a user converts.
Example:
Input:
notification_deliveries table
| Column | Type |
|---|---|
notification |
VARCHAR |
user_id |
INTEGER |
created_at |
DATETIME |
users table
| Column | Type |
|---|---|
id |
INTEGER |
created_at |
DATETIME |
conversion_date |
DATETIME |
Output:
| Column | Type |
|---|---|
total_pushes |
INTEGER |
frequency |
INTEGER |
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