Hive - UNIX_TIMESTAMP Quandary

问题

Here is my 1 line of data (for brevity):

73831   12/26/2014 1:00:00 AM   0.3220

The 2nd column is the time column which is in string format. I'm using this hive query:

select col2, UNIX_TIMESTAMP(col2,'MM/DD/YYYY hh:mm:ss aaa') from Table

Here is what I get: 1388296800

However, when I check with, http://www.epochconverter.com/ and also from_unixtime(1388296800), I get a different date.

Is there something wrong with my format / pattern string I enter into UNIX_TIMESTAMP in Hive?

回答1:

Your date format symbols need to conform to those in the Java SimpleDateFormat documentation.

For your date it looks like you want MM/dd/yyyy HH:mm:ss aa.

来源：https://stackoverflow.com/questions/28884963/hive-unix-timestamp-quandary