THE RESEARCH AND DESIGN OF SELECT SENTENCE IN THE SQL OF OODB SYSTEM

In this thesis，the author mainly discusses how to design and achieve the object-oriented based SQL DML in the Object-oriented Engineering Database System．Upon that，the users can manipulate the complex engineering OODB model by the compact instructions．In particular，we explain the structure and the achievement method of the SELECT Syntax Analysis Tree．The method for expanding the ANSI SQL，and developing the data structure in the accidence analysis and syntax analysis is also discussed．