I am having some serious mental block here. Here is the abstract version of my problem. I have a table like this:
unique_id (PK) broadcast_id date_sent status 1 1 2005-04-04 30 2 1 2005-04-01 30 3 1 2005-05-20 10 4 2 2005-05-29 30 So it is a table that stores broadcasts including the broadcast_id, the date sent, and the status of the broadcast. What I would like to do is simply get the last date_sent and it's status for every broadcast. I can't do a GROUP BY because I can't put an aggregate on the status column. SELECT MAX(date_sent), status FROM broadcast_history GROUP BY broadcast_id How do I get the status for the most recent date_sent using GROUP BY? DISTINCT also doesn't work SELECT DISTINCT ON (email_broadcast_id) * FROM email_broadcast_history ORDER BY date_sent As you have to have the DISTINCT fields matching the ORDER BY fields. I have to ORDER BY date_sent, but I can't do a DISTINCT on date_sent I keep thinking am I missing something. Does anybody have any ideas? ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
