http://www.programmingfaqs.com/category/databases/sql-faqs The taxonomy view with a depth of 0. en http://www.programmingfaqs.com/question/what-difference-between-union-and-union-all http://www.programmingfaqs.com/question/what-difference-between-union-and-union-all#comments db concepts SQL FAQs Mon, 09 Jun 2008 15:07:49 -0600 28 at http://www.programmingfaqs.com