The 12th International Conference on Database Systems for Advanced Applications (DASFAA), organized jointly by the Asian Institute of Technology, National Electronics and Computer Technology Center and Sirindhorn International Institute of Technology, sought to provide information to users and practitioners of database and database systems on advanced applications. The DASFAA conference series has already established itself and it continues to attract, each year, participants from all over the world. In this context, it may be recalled that the previous DASFAA conferences were successfully held in Seoul, Korea (1989), Tokyo, Japan (1991), Daejeon, Korea (1993), Singapore (1995), Melbourne, Australia (1997), Taiwan, ROC (1999), Hong Kong (2001), Kyoto, Japan (2003), Jeju Island, Korea (2004), Beijing, China (2005) and Singapore (2006). Thailand had the opportunity to host this prestigious and important international conference and join the league. This conference provides an international forum for academic exchanges and technical discussions among researchers, developers and users of databases from academia, business and industry. DASFAA focuses on research in database theory, development of advanced DBMS technologies and their advanced applications. It also promotes research and development activities in the field of databases among participants and their institutions from Pacific Asia and the rest of the world .