Generate Date Sequence in Hive

1 year ago
Olivia Parker
1 minute

In Hive, you can use the GENERATE statement and LATERAL VIEW to generate a sequence of dates. For example, here is a sample code that generates consecutive dates:

SELECT date_sub('2022-01-01', n) as date
FROM (
    SELECT posexplode(sequence(0, datediff('2022-01-31', '2022-01-01'))) as (n, _)
) t;

In the above example, we first use the datediff function to calculate the number of days within a date range. Then, we use the sequence function to generate a sequence from 0 to this number of days. We then use the posexplode function to split the sequence into rows, and finally use the date_sub function to gradually subtract the values in the sequence from the start date to obtain consecutive dates.

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