PostgreSQL - fetch the row which has the Max value for a column

Question

I\'m dealing with a Postgres table (called \"lives\") that contains records with columns for time_stamp, usr_id, transaction_id, and lives_remaining. I need a query that wil

Answer 1

I would propose a clean version based on DISTINCT ON (see docs):

SELECT DISTINCT ON (usr_id)
    time_stamp,
    lives_remaining,
    usr_id,
    trans_id
FROM lives
ORDER BY usr_id, time_stamp DESC, trans_id DESC;