hive sql find the latest record

Question

the table is:

create table test (
id string,
name string,
age string,
modified string)

data like this:

id    name   age  modife         


        

Answer 1

Just slightly different approach than what has been answered in previous answer.

Below example uses hive windowing function to find out the latest record, read more here

SELECT t.id
    ,t.name
    ,t.age
    ,t.modified
FROM (
    SELECT id
        ,name
        ,age
        ,modified
        ,ROW_NUMBER() OVER (
            PARTITION BY id ORDER BY unix_timestamp(modified,'yyyy-MM-dd hh:mm:ss') DESC
            ) AS ROW_NUMBER   
    FROM test
    ) t
WHERE t.ROW_NUMBER <= 1;

The modified is string so converting it to timestamp using unix_timestamp(modified,'yyyy-MM-dd hh:mm:ss') then applying order by on timestamp.