✅✅MySQL || Group by || Easy to understand
\nselect event_day as day,emp_id,sum(out_time-in_time)  as total_time \nfrom Employees \ngroup by day,emp_id;\n
```\nselect event_day as day,emp_id,sum(out_time-in_time)  as total_time \nfrom Employees \ngroup by day,emp_id;\n```
[]