Session Difference
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Given a table of user sessions, write a query to get the number of days between each user’s first session and last session for the year 2020.
Example:
Input:
user_sessions table
| Column | Type |
|---|---|
session_id |
INTEGER |
created_at |
DATETIME |
user_id |
INTEGER |
Output:
| Column | Type |
|---|---|
user_id |
INTEGER |
no_of_days |
INTEGER |
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