| employee_id | start_time | end_time | | ----------- | ---------- | -------- | | 1 | 08:00:00 | 12:00:00 | | 1 | 11:00:00 | 15:00:00 | | 1 | 14:00:00 | 18:00:00 | | 2 | 09:00:00 | 17:00:00 | | 2 | 16:00:00 | 20:00:00 | | 3 | 10:00:00 | 12:00:00 | | 3 | 13:00:00 | 15:00:00 | | 3 | 16:00:00 | 18:00:00 | | 4 | 08:00:00 | 10:00:00 | | 4 | 09:00:00 | 11:00:00 |