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| startDt | endDt | count(*) |
|---|---|---|
| 2011-12-18 16:00:00 | 2011-12-18 17:00:00 | 1 |
| 2011-12-19 08:00:00 | 2011-12-19 10:00:00 | 1 |
| 2011-12-19 11:00:00 | 2011-12-19 12:00:00 | 1 |
| 2011-12-19 12:00:00 | 2011-12-19 13:00:00 | 2 |
| 2011-12-19 13:00:00 | 2011-12-19 14:00:00 | 3 |
| 2011-12-19 14:00:00 | 2011-12-19 15:00:00 | 1 |
| 2011-12-20 13:00:00 | 2011-12-20 14:00:00 | 1 |