Using SQL to get the Last Reply on a Post

Posted by Anraiki on Stack Overflow See other posts from Stack Overflow or by Anraiki
Published on 2010-03-24T07:22:32Z Indexed on 2010/03/24 7:33 UTC
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sql

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query

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php

I am trying to replicate a forum function by getting the last reply of a post.

For clarity, see PHPBB: there are four columns, and the last column is what I like to replicate.

I have my tables created as such:

discussion_id (primary key)
user_id
parent_id
comment
status
pubdate

I was thinking of creating a Link Table that would update for each time the post is replied to.

The link table would be as follow:

discussion_id (primary key)
last_user_id
last_user_update

However, I am hoping that theres a advance query to achieve this method. That is, grabbing each Parent Discussion, and finding the last reply in each of those Parent Discussions.

Am I right that there is such a query?

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