我对Spark和Scala相对较新.我有一个数据帧,其格式如下:
| Col1 | Col2 | Col3 | Col_4 | Col_5 | Col_TS | Col_7 |
| 1234 | AAAA | 1111 | afsdf | ewqre | 1970-01-01 00:00:00.0 | false |
| 1234 | AAAA | 1111 | ewqrw | dafda | 2017-01-17 07:09:32.748 | true |
| 1234 | AAAA | 1111 | dafsd | afwew | 2015-01-17 07:09:32.748 | false |
| 5678 | BBBB | 2222 | afsdf | qwerq | 1970-01-01 00:00:00.0 | true | …