Question

Never came across this before…

SELECT ".TBL_USERS.".username, 
       ".TBL_USERS.".id,  <-----------|
       ".TBL_COMMENTS.".creator,      |
       ".TBL_COMMENTS.".comment,      |- same column name
       ".TBL_COMMENTS.".date,         |
       ".TBL_COMMENTS.".id  <---------|

As you can see, I am selecting two id columns… When i take them in PHP:

$userid = $row['id'];

How will I be able to realize which one is which?

Answer 1

You need to use a column alias, with AS keyword:

Example:

(id) AS id1.........(id) AS id2

Now from your query result, you can get them like this:

$userid1 = $row['id1'];
$userid2 = $row['id2'];

More Info:

http://dev.mysql.com/doc/refman/5.0/en/select.html