Find the difference in days from previous timestamp in hive

问题

I want to find the days difference and populate a new column in my target table. The difference is created by subtracting the previous date from current date.

Please find the attached screen shot for reference.

Thanks.

回答1:

Using LAG function help you to get the previous row and DATEDIFF to get the difference.

select
    id,
    function_id,
    key,
    pre_date,
    datediff(pre_date, lag(pre_date, 1) over(order by id)) as days_difference
from
    [Your_Table]

来源：https://stackoverflow.com/questions/52831735/find-the-difference-in-days-from-previous-timestamp-in-hive