Question

What i need to do is select the comment details and the last action taken on the comment; I have 3 tables:

Comment

CommentID, commentText, userID, date_posted

Action

ActionID, action_taken,userID,date_actioned

and CommentJoinAction

id,ActionID,CommentID

There can be one comment, but many actions on the comment.

my SQL is looking something like:

Select /*snip comment details and such*/
From Comment
Inner Join (select max(actionid) from commentjoinaction) as cja on /*blah cause you know from reading this, it won't work*/

So what is it that I can do so that I always pick up the latest commentAction for the comments.

many thanks

Answer 1

Is this what you are looking for?

SELECT 
/*Select desired fields*/
FROM Comments AS C
    INNER JOIN (
                SELECT 
                    CommentID
                    ,MAX(ActionID) AS ActionID
                FROM CommentJoinAction
                GROUP BY CommentID
            )AS CJA
        ON C.CommentID = CJA.CommentID
        INNER JOIN ACTION AS A
            ON CJA.ActionID = A.ActionID