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Finish Chapter 1 Workers behind the Scene - Classes

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1/19/2012<br />

External or view level<br />

• External Schema<br />

– Different Views<br />

– Defined by end user requirements<br />

Courseinfo(cid: string, fname: string, enrollment: integer)<br />

Classification of Database<br />

Management Systems<br />

• Data model<br />

• Relational<br />

• Object<br />

• Hierarchical and network (legacy)<br />

• Native XML DBMS<br />

• Number of users<br />

• Single-user<br />

• Multiuser<br />

10

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