MySQL Solution
Code\n\n# Write your MySQL query statement below\nselect event_day as day, emp_id, sum(out_time - in_time) as total_time \nfrom Employees group by day, emp_id;\
# Code\n```\n# Write your MySQL query statement below\nselect event_day as day, emp_id, sum(out_time - in_time) as total_time \nfrom Employees group by day, emp_id;\n```
['MySQL']