First a comment about your post. Intentional or not, you come across as being demanding and expectant. My initial urge was to blow off the post entirely. Than being said, please be more courteous when you post in the future and consider that the people in this forum are here because they want to help people, not because you need a quick solution.
Now an actual answer.
Since mysql does not support a UNION directive, you need to create a temporary table as a staging area, build your data into it, and then query the temp table. Here's how it would go:
mysql_query("CREATE TEMPORARY TABLE Temp_Table TYPE=HEAP SELECT Title, Date from Article");
mysql_query("INSERT INTO Temp_Table SELECT Title, Date FROM News");
mysql_query("SELECT * FROM Temp_Table ORDER BY Date ASC");
After your script ends or you close the MySQL session the Temp_Table is automatically destroyed. Check out the MySQL manual for more info on temporary tables. Good luck
