BIT Durg

database management system isa relationship aggregation in dbms attribute inheritance specialization and generalization university questions in e r modelling csvtu dbms class e r model university questions solution of e r model identifying entity set identifying relationship strong and weak entity set weak entity set strong entity set many to many many to one one to many one to one cardinality ratio mapping cardinality unary relationship recursive relationship relationship multivalued attribute derived attribute composite attributes simple attributes attributes in e r model entity sophisticated user naive user database administrator dba database users types of database users dbms architecture ansi sparc architecture ansi sparc 3 level architecture levels of data abstraction advantages of dbms bit durg drawbacks of file processing system object based data models record based data models relational model network model hierarchical data model data models