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Introduction to Database System

Introduction to Database System
Which of the following is NOT a basic element of all versions of the E-R model?

Attributes
Entities
Relationships
Primary keys

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Introduction to Database System
Which of the following products implemented the CODASYL DBTG model?

DB2
IDMS
R:base
dBase-II

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Introduction to Database System
For some relations, changing the data can have undesirable consequences called:

modification anomalies.
transitive dependencies.
referential integrity constraints.
normal forms.

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Introduction to Database System
In SQL, which command is used to make permanent changes made by statements issue since the beginning of a transaction?

ZIP
SAVE
COMMIT
PACK

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Introduction to Database System
If you want your database to include methods, you should use a _____ database.

Distributed
Hierarchical
Network
Object-Oriented

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Introduction to Database System
The DBMS that is most difficult to use is ________ .

Microsoft's Access
Microsoft's SQL Server
Oracle Corporation's Oracle
IBM's DB2

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