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| id | start | finish |
|---|---|---|
| 1 | 07:00:00 | 11:00:00 |
| 2 | 12:30:00 | 17:00:00 |
| 3 | 11:30:00 | 14:00:00 |
| 4 | 09:30:00 | 11:30:00 |
| 5 | 10:00:00 | 15:00:00 |
| 6 | 09:00:00 | 13:30:00 |
| 7 | 07:00:00 | 11:30:00 |
| id | start | finish |
|---|---|---|
| 1 | 07:00:00 | 11:00:00 |
| 7 | 07:00:00 | 11:30:00 |
| 6 | 09:00:00 | 13:30:00 |
| 4 | 09:30:00 | 11:30:00 |
| 5 | 10:00:00 | 15:00:00 |
| 3 | 11:30:00 | 14:00:00 |
| 2 | 12:30:00 | 17:00:00 |
| COUNT(*) |
|---|
| 5 |