pyspark:两个日期列之间的小时差

我想计算pyspark中两个日期列之间的小时数。 只能找到如何计算日期之间的天数

dfs_4.show()


+--------------------+--------------------+
|        request_time|            max_time|
+--------------------+--------------------+
|2017-11-17 00:18:...|2017-11-20 23:59:...|
|2017-11-17 00:07:...|2017-11-20 23:59:...|
|2017-11-17 00:35:...|2017-11-20 23:59:...|
|2017-11-17 00:10:...|2017-11-20 23:59:...|
|2017-11-17 00:03:...|2017-11-20 23:59:...|
|2017-11-17 00:45:...|2017-11-20 23:59:...|
|2017-11-17 00:35:...|2017-11-20 23:59:...|
|2017-11-17 00:59:...|2017-11-20 23:59:...|
|2017-11-17 00:28:...|2017-11-20 23:59:...|
|2017-11-17 00:11:...|2017-11-20 23:59:...|
|2017-11-17 00:13:...|2017-11-20 23:59:...|
|2017-11-17 00:42:...|2017-11-20 23:59:...|
|2017-11-17 00:07:...|2017-11-20 23:59:...|
|2017-11-17 00:40:...|2017-11-20 23:59:...|
|2017-11-17 00:15:...|2017-11-20 23:59:...|
|2017-11-17 00:05:...|2017-11-20 23:59:...|
|2017-11-17 00:50:...|2017-11-20 23:59:...|
|2017-11-17 00:40:...|2017-11-20 23:59:...|
|2017-11-17 00:25:...|2017-11-20 23:59:...|
|2017-11-17 00:35:...|2017-11-20 23:59:...|
+--------------------+--------------------+

计算天数：

from pyspark.sql import functions as F
dfs_5 = dfs_4.withColumn('date_diff', F.datediff(F.to_date(dfs_4.max_time), F.to_date(dfs_4.request_time)))

dfs_5.show()

+--------------------+--------------------+---------+
|        request_time|            max_time|date_diff|
+--------------------+--------------------+---------+
|2017-11-17 00:18:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:07:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:35:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:10:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:03:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:45:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:35:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:59:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:28:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:11:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:13:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:42:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:07:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:40:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:15:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:05:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:50:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:40:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:25:...|2017-11-20 23:59:...|        3|
|2017-11-17 00:35:...|2017-11-20 23:59:...|        3|
+--------------------+--------------------+---------+

我怎么能在几个小时内做同样的事情？ 感谢您的帮助

您可以使用它从日期时间字段中提取小时，然后将其减去到新列中。现在有一种情况，时差超过一天，你需要在这两者之间加上整整几天。因此，我会像您一样创建days_diff专栏，然后尝试以下方法：

from pyspark.sql import functions as F

dfs_5 = dfs_4.withColumn('hours_diff', (dfs_4.date_diff*24) + 
                          F.hour(dfs_4.max_time) - F.hour(dfs_4.request_time))

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很高兴我能帮你投票，如果这是一个有用的答案