Exam 2: Data Models

The ____________________ is the conceptual organization of the entire database as viewed by the database administrator.

Database designers determine the data and information that yield the required understanding of the entire business.

In the ____ model,the basic logical structure is represented as an upside-down tree.

The ____ model is said to be a semantic data model.

Business rules must be rendered in writing.

A(n)____ is anything about which data are to be collected and stored.

MySQL is an example of a(n)____.

M:N relationships are not appropriate in a relational model.

Oracle 11g is an example of a(n)____.

In Chen notation,entities and relationships must be oriented horizontally.

A(n)____________________ is a relatively simple representation of more complex real-world data structures.

A(n)____________________ is a representation of the relational database's entities,the attributes within those entities and the relationships between those entities.

The object-oriented data model was developed in the ____.

The ____ model was developed to allow designers to use a graphical tool to examine structures rather than describing them with text.

Each row in a relation is called a(n)____________________.

A(n)____ model represents a global view of the database as viewed by the entire organization.

Business rules are derived from ____.

Students and classes have a ____ relationship.

The network model has structural level dependence.

Use of the relational model has declined because of the difficulty in incorporating features from the object-oriented (OO)data model.