Date PySpark-模糊日期匹配或联接
我需要在Date PySpark-模糊日期匹配或联接,date,apache-spark,datetime,join,pyspark,Date,Apache Spark,Datetime,Join,Pyspark,我需要在main_df中创建一个二进制变量,该变量以ind_df中最近的相互日期为条件 main=spark.createDataFrame([("J1", "2016-10-01 00:42:00", 100), ("J1", "2016-10-01 11:45:30", 200), ("J1", "2016-10-05 16:20
main_df
中创建一个二进制变量,该变量以ind_df
中最近的相互日期为条件
main=spark.createDataFrame([("J1", "2016-10-01 00:42:00", 100), ("J1", "2016-10-01 11:45:30", 200),
("J1", "2016-10-05 16:20:00", 100), ("J9", "2016-10-06 08:35:00", 300),
("J9", "2016-10-07 01:20:00", 200)], ["id", "date", "value"]).show()
ind_df=spark.createDataFrame([("J1", "2016-10-01 00:15:30"), ("J1", "2016-10-01 11:45:40"),
("J9", "2016-10-07 01:20:50")], ["id", "date"]).show()
+---+-------------------+-----+
| id| date|value|
+---+-------------------+-----+
| J1|2016-10-01 00:42:00| 100|
| J1|2016-10-01 11:45:30| 200|
| J1|2016-10-05 16:20:00| 100|
| J9|2016-10-06 08:35:00| 300|
| J9|2016-10-07 01:20:00| 200|
+---+-------------------+-----+
+---+-------------------+
| id| date|
+---+-------------------+
| J1|2016-10-01 00:15:30|
| J1|2016-10-01 11:45:40|
| J9|2016-10-07 01:20:50|
+---+-------------------+
所需数据帧:
+---+-------------------+-----+-----+
| id| date|value| ind |
+---+-------------------+-----+-----+
| J1|2016-10-01 00:42:00| 100| 1 |
| J1|2016-10-01 11:45:30| 200| 1 |
| J1|2016-10-05 16:20:00| 100| 0 |
| J9|2016-10-06 08:35:00| 300| 0 |
| J9|2016-10-07 01:20:00| 200| 1 |
+---+-------------------+-----+-----+