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Unit 14: Data Modeling
Notes
Figure 14.5(a): ER diagram for the entity: AccountHolder
(Name, Address, DateOfBirth, DateOfOpeningAccount)
Figure 14.5(b): ER diagram for the entity:
Account(AccountNumber, OpeningBalance)
The ER diagram for the relationship “Owns” between these two entities is shown in the
figure 14.6.
Figure 14.6: ER diagram the relationship “Owns”
Self Assessment
Fill in the blanks:
1. E-R diagrams are very useful tools to develop and describe the …………………… of a
database.
2. A relationship that exists between two entities is called ……………………… relationship.
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