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4 rows affected
| visit | patientid | visit_date | flag |
|---|---|---|---|
| 1 | 23 | 12/01/2018 00:00:00 | 0 |
| 2 | 23 | 30/01/2018 00:00:00 | 1 |
| 3 | 23 | 20/04/2018 00:00:00 | 0 |
| 4 | 23 | 02/05/2018 00:00:00 | 1 |