@book{175275, author = {Gamage, Suren Dilanka and Mr. C.P. Wijesiriwardana}, title = {Improving query processing performance in database management systems}, publisher = {Faculty of Information Technology, University of Moratuwa }, year = {2018}, address = {Moratuwa}, url = {http://dl.lib.mrt.ac.lk/handle/123/13422} }