Database Management Systems, hyunja Lee1 The Entity-Relationship Model Chapter 2.
D ATABASE S YSTEMS I W EEK 2 T HE E NTITY -R ELATIONSHIP M ODEL.
Book Chapter 3 (part 2 ) From ER to Relational Model.
Levels of Abstraction in DBMS data * Schemas are defined using DDL; data is modified/queried using DML. – Views describe how users see data (possibly.
