Write a query to find the average time elapsed between a user registering on GoFundMe and launching their first campaign.
Use the users and campaigns tables. Consider only users with a registration timestamp and at least one launched campaign.
average_elapsed_days, rounded to two decimal places.| Column | Type | Description |
|---|---|---|
| user_idPK | INT | Unique GoFundMe user identifier |
| display_name | VARCHAR(100) | User's display name |
| registered_at | TIMESTAMP | Timestamp when the user registered |
| Column | Type | Description |
|---|---|---|
| campaign_idPK | INT | Unique campaign identifier |
| user_id | INT | User who created the campaign |
| title | VARCHAR(200) | Campaign title |
| launched_at | TIMESTAMP | Timestamp when the campaign was launched |