Question : Group statement

I am trying to query a UNION statement, but am having issues finishing.  I'd like to hav the latest information be displayed from both tables in order of their date.  Any help is greatly appreciated.
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$grabContribs = "SELECT answers.user, answers.answer, answers.qID, answers.date, user_question.question, user_question.id, user_question.make, user_question.model
                        	FROM answers
                         	LEFT JOIN user_question ON answers.qID = user_question.id
                         	WHERE answers.user = '" . $_SESSION['username'] . "'
                         	GROUP BY date
                         	UNION
                         	SELECT how_to.user, how_to.howto, how_to.id, how_to.NULL, how_to.date, how_to.question, how_to.viewable, how_to.make, how_to.model
                         	WHERE how_to.user = '" . $_SESSION['username'] . "'
                         	GROUP BY date";
                        $contribsGrabbed = mysql_query($grabContribs) or die("Grab did not work because: " . mysql_error());
                        	while($c = mysql_fetch_array($contribsGrabbed)) {
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Answer : Group statement

Aren't you missing a FROM in the second SELECT? And how_to.NULL will not work, it is just NULL.
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SELECT answers.user, answers.answer, answers.qID, user_question.question,
       answers.date, user_question.id, user_question.make, user_question.model
  FROM answers LEFT JOIN user_question ON answers.qID = user_question.id
 WHERE answers.user = '" . $_SESSION['username'] . "'
UNION
SELECT how_to.user, how_to.howto, how_to.id, NULL,
       how_to.date, how_to.question, how_to.viewable, how_to.make, how_to.model
  FROM how_to LEFT JOIN user_question ON how_to.ID = user_question.id
 WHERE how_to.user = '" . $_SESSION['username'] . "'
ORDER BY 5
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