Question

I have 2 tables which I want to query from.

The first table (lets call it users) has these columns: id and name.

The second table (lets call it transactions) has these columns: user_id, amount and timestamp.

How do I find out the latest timestamp in transactions for each user in the users table?

EDIT:

Thanks for all your answers so far! Really appreciate it. How about, if I want to select users with the latest timestamp greater than a certain value?

Answer 1

SELECT u.*,MAX(t.timestamp) latest_timestamp
FROM transactions t
LEFT JOIN users u ON t.user_id=u.id
GROUP BY t.user_id

Should be what you’re looking for. This query should select the latest transaction timestamp for each user.