Problem Description –
Write an SQL query to show the unique ID of each user, If a user does not have a unique ID replace just show
Return the result table in any order.
The query result format is in the following example.
Difficulty Level – Easy
Problem Link – Replace Employee ID
SELECT unique_id, name FROM ( SELECT e.id, e.name, eu.unique_id FROM EMployees as e LEFT JOIN EmployeeUNI as eu ON e.id = eu.id ) x