MySQL / PHP处理查询帮助

Ok, I have two tables that I am joining and doing a select on to get three fields back (timestamp, message, and articleNum). Now, this data is basically a log of when an article was created and modified, I have to write the logic to process those three fields I got back. In order to figure out when an article was created and/or modified last, I need to look at the message and look for the keywords ("added" for created and "updated" for modified). I have the results of the query back in an assoc array and I would eventually like to have the end result be in an assoc array with the articleNum being the key and a two value array (created, modified) being the key. Sometimes though, there won't always be a modified value, but there will always be a created. Any idea on how I would even start a problem like this?Ok, I have two tables that I am joining and doi