Need SQL Help Finding Current Status of members

From: "Michael Avila" <Michael(dot)Avila(dot)1(at)sbcglobal(dot)net>
To: "SQL PostgreSQL MailList" <pgsql-sql(at)postgresql(dot)org>
Subject: Need SQL Help Finding Current Status of members
Date: 2005-12-16 01:31:09
Message-ID: NBBBLNPHAMCFENDFHIDCGENBEGAA.Michael.Avila.1@sbcglobal.net
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-sql

I have a table which keeps track of the status of members. In the table is

member_id int(8)
status_code char(1)
status_date date

KEY member_id (member_id,status_code,status_date)

Each member can have multiple records because a record is added each time
the status changes but the old record is kept for history.

What I want to do is find the latest status for each member. Actually I want
to find all those with an status of "A". But it must be the current (latest)
status. How do I find the most current date for each member in a pile of
many records for many members with many status settings with one SQL
statement? This is a bit beyond my capabilities so I am asking for help.

My initial SQL is

SELECT * FROM memberstatus WHERE status_code = 'a'

but that is my limit. I know an AND comes next but need help after that! I
know that MAX is not for dates so that is out. Is there a LATEST DATE? I did
not see one when I was looking at the date functions.

Appreciate the help.

Mike

Attachment Content-Type Size
winmail.dat application/ms-tnef 1.9 KB

Responses

Browse pgsql-sql by date

  From Date Subject
Next Message Michael Fuhr 2005-12-16 02:58:52 Re: Need SQL Help Finding Current Status of members
Previous Message Ken Winter 2005-12-15 17:20:28 Re: Defaulting a column to 'now'