Postgres - aggregate two columns into one item

Question

I would like to aggregate two columns into one \"array\" when grouping.

Assume a table like so:

friends_map:
=================================
user_i         


        

Answer 1

You can use: array[]

Just do that:

SELECT user_id, array[friend_id, confirmed]
FROM friend_map
WHERE user_id = 1
GROUP BY 1;