The InstantRide User Satisfaction team are looking forward to creating discounts for the users. However, the team suspects that there could be duplicate users in the system with different emails....

The InstantRide User Satisfaction team are looking forward to creating discounts for the users. However, the team suspects that there could be duplicate users in the system with different emails. Check for the users with their names and surnames for potential duplicates. Therefore, you need to JOIN the USERS table with USERS table and compare for equality of USER_FIRST_NAME and USER_LAST_NAME and difference in USER_ID fields.