How to get date difference in minutes using Hive

问题:

Below query is my sql server query and I want it to convert it into hive query:

select DATEDIFF([minute], '19000101', '2013-01-01 10:10:10')

回答1:

You could use unix_timestamp for dates after 1970:

SELECT (unix_timestamp('2013-01-01 10:10:10') 
      - unix_timestamp('1970-01-01 00:00:00'))/60 

1. Convert both dates to seconds from 1970-01-01
2. Substract them
3. Divide by 60 to get minutes

EDIT:

Adding Minutes: change date to unixtime -> add var * 60sec -> convert back to date

SELECT from_unixtime(unix_timestamp('2013-01-01 10:10:10') + 10 * 60) AS result

db<>fiddle demo using MySQL