Exam 2: Data Models

The relational data model was developed in the ____.

A(n)____________________ in a hierarchical model is the equivalent of a record in a file system.

The ____ model uses the concept of inheritance.

Describe the three parts involved in any SQL-based relational database application.

What components should an implementation-ready data model contain?

A verb associating two nouns in a business rule translates to a(n)____ in the data model.

In ____________________,relationships are represented by a diamond connected to the related entities through a relationship line.

The hierarchical data model was developed in the ____.

The ____ model uses the term connectivity to label the relationship types.

When you can change the internal model without affecting the conceptual model,you have ____________________ independence.

VMS/VSAM is an example of a(n)____.

A(n)____ is a restriction placed on the data.

A noun in a business rule translates to a(n)____ in the data model.

Business rules apply to businesses and government groups,but not to other types of organizations such as religious groups or research laboratories.

____ are normally expressed in the form of rules.

A manager and a programmer usually have the same view of the same data.

The terms data model and database model are often used interchangeably.

One of the limitations of the ____ model is that there is a lack of standards.

The entity relationship model is limited to conceptual modeling,with no implementation component.

Each column in a relation represents a(n)____________________.