MySQL Solution
\n# Write your MySQL query statement below\nSELECT event_day AS day, \nemp_id, SUM(out_time-in_time) AS total_time\nFROM Employees GROUP BY event_day,emp_id;\n
```\n# Write your MySQL query statement below\nSELECT event_day AS day, \nemp_id, SUM(out_time-in_time) AS total_time\nFROM Employees GROUP BY event_day,emp_id;\n```
['MySQL']