Join Example (2)
<books_and_customers> <bookstore> <fiction> <sci-fi> <book> <isbn�</isbn> <title>Do androids dream of electric sheep</title> <author>Philip K. Dick</author> <customers> <customer> <name>P.W. Ellis</name> <boughtbooks> <isbn�</isbn> <isbn�</isbn> </boughtbooks> </customer> </customers> </book> </sci-fi>
<fantasy> <mystery> <book> <isbn�</isbn> <title>The two towers</title> <author>JRR Tolkien</author> <customers> <customer> <name>Jason Woolsey</name> <boughtbooks> <isbn�</isbn><isbn�</isbn> </boughtbooks> </customer> <customer> <name>P.W. Ellis</name> <boughtbooks> <isbn�</isbn> <isbn�</isbn> </boughtbooks> </customer> </customers> </book> </mystery> </fantasy> </fiction> </bookstore> </books_and_customers>