MYSQL || Easy approach
\n# Code\n\n# Write your MySQL query statement below\nselect event_day as day, emp_id, sum(out_time-in_time) as total_time from Employees group by event_day, em
\n# Code\n```\n# Write your MySQL query statement below\nselect event_day as day, emp_id, sum(out_time-in_time) as total_time from Employees group by event_day, emp_id\n```
['MySQL']