Preston Zhang has over 20 years of experiences in database design and implementation. As a database administrator, he manages Oracle, SQL Server and MySQL database servers for university departments in Georgia. He has done many database migration projects in Oracle, SQL Server and MySQL database systems. He has written many queries in Oracle SQL, SQL Server T-SQL and MySQL to process millions of records for business reports. He has developed Web applications using Oracle database as back-end for a large health care company. He has taught undergraduate database and programming courses in private universities for over 10 years. He has a Master of Science degree in Computer Information Systems from University of Wisconsin-Parkside. He lives in Georgia with his family and can be reached at pzhang0@hotmail.com.