我有桌子
+---------------+------------+------------+--------+
| AccountNumber | OpenDate | CloseDate | Status |
+---------------+------------+------------+--------+
| 1100 | 01/01/2020 | 01/10/2020 | closed |
| 1100 | 01/01/2020 | 01/05/2020 | open |
| 1111 | 01/02/2020 | 01/20/2020 | open |
| 1100 | 01/01/2020 | 01/02/2020 | open |
| 1122 | 01/08/2020 | 01/03/2020 | open |
+---------------+------------+------------+--------+
我想要的输出是
+---------------+------------+------------+--------+
| AccountNumber | OpenDate | CloseDate | Status |
+---------------+------------+------------+--------+
| 1111 | 01/02/2020 | 01/20/2020 | open |
| 1122 | 01/08/2020 | 01/03/2020 | open |
+---------------+------------+------------+--------+
我不想关闭帐户。只需要输出数据集中的未结账户