MySQL - Pulling List Pending on Dates

Question

I have a table like this:

ID_____PostingDate_____PosterID
--------------------------------
1______05/01/2012______450
2______06/30/2012______451
3______02/17/2013______451
4______12/10/2012______451
5______06/14/2012______452
6______06/15/2012______452
7______05/01/2012______453
8______06/04/2012______453
9______04/05/2013______454
10_____05/05/2013______454

I'm trying to get a list of all PosterIDs that have posted in May or June of 2012 and have not posted again since then.

Desired Result from the table above:

PosterID
--------
450
452
453

I've tried:

WHERE DATE_FORMAT(PostingDate, '%m-%Y') IN ('05-2012', '06-2012')

and

SELECT UNIQUE(a.PosterID)
FROM 
    (SELECT ID, PostingDate, PosterID FROM table WHERE DATE_FORMAT(PostingDate, '%m-%Y') IN ('05-2012', '06-2012') 
    ) a
WHERE DATEDIFF(PostingDate, NOW()) > 365

though neither of these are getting close

Answer 1

Try this:

SELECT DISTINCT PosterID
FROM table1
WHERE PostingDate BETWEEN '2012-05-01' AND '2012-06-30'
AND posterID NOT IN (SELECT PosterID
  FROM table1
  WHERE PostingDate > '2012-07-01');

sqlfiddle demo

Answer 2

  SELECT PosterID
    FROM (  SELECT PosterID, MAX(PostingDate) AS latest_post
              FROM tbl
          GROUP BY 1) latest_posts
   WHERE latest_post BETWEEN '2012-05-01' AND '2012-06-30'
ORDER BY PosterID;

Answer 3

尝试这样的事情：

where PostingDate < '2012-7-1' and PostingDate >= '2012-5-1'