问题
I'm having a string like "08/03/2018 02:00:00" which i'm trying to convert into a timestamp value.
I'm using the below code:
unix_timestamp("08/03/2018 02:00:00", "yyyy-MM-dd'T'HH:mm:ss.SSSXXX")
when i use the above code it's throwing a NULL value.
How can i convert this string to Timestamp in Hive/Hue Editor?
回答1:
The format you specified does not match to the actual timestamp.
If 08/03 in your example is dd/MM then:
select unix_timestamp("08/03/2018 02:00:00", "dd/MM/yyyy HH:mm:ss")
OK
1520503200
Time taken: 0.299 seconds, Fetched: 1 row(s)
select from_unixtime(unix_timestamp("08/03/2018 02:00:00", "dd/MM/yyyy HH:mm:ss"))
OK
2018-03-08 02:00:00
Time taken: 0.068 seconds, Fetched: 1 row(s)
See this answer if you want convert from ISO timestamp https://stackoverflow.com/a/23520257/2700344
You can specify date pattern for unix_timestamp for non-standard format. See docs here: https://cwiki.apache.org/confluence/display/Hive/LanguageManual+UDF#LanguageManualUDF-DateFunctions
来源：https://stackoverflow.com/questions/49814880/convert-string-to-timestamp-in-hive-hql