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| Status1 | Status2 | Dt1 | Dt2 |
|---|---|---|---|
| A | D | 2019-05-23 10:00:00 | 2019-05-23 13:00:00 |
| A | D | 2019-05-23 14:00:00 | 2019-05-23 17:00:00 |
| A | null | 2019-05-23 18:00:00 | null |
Warning: Null value is eliminated by an aggregate or other SET operation.