Data access in a data base management system is controlled. The method for controlling the data access in a computer having a first memory and a sub memory, both for storing data required to execute a program, including at least one data operation instruction comprises the steps of transferring data...http://www.google.de/patents/US4476528?utm_source=gb-gplus-sharePatent US4476528 - Method and apparatus for controlling a data access in a data base management system