48
Entity occurrence
According to Thomas Connolly & Carolyn Begg¹
0
, entity
occurrence
is a
uniquely
identifiable
association,
which
includes one occurrence from each participating entity type.
2.2.4.1.2 Relationship Types
Relationship types
According to Thomas Connolly & Carolyn Begg¹¹,
relationship types are a set of meaningful association among
entity types. Below is the example of ER diagram of branch
that has staff relationship:
Figure 2. 5 ER Diagram of Branch has staff relationship
(Connolly & Begg, 2004, pg.347)
10
Thomas Connoly, Carolyn Begg (2005 ). Database Systems: A Practical Approach to Design,
Implementation,
and Management. 4th ed.England:Addison
Wesley. p345 .
11
Thomas Connoly, Carolyn Begg (2005 ).
Database Systems: A Practical Approach to Design,
Implementation,
and Management.
4th ed.England:Addison Wesley. p346 .
 |