Describe what attributes represent in an ER model and provide examples of simple, composite, single-value, multi-value, and derived attributes.
What will be an ideal response?
An attribute represents a property of an entity or a relationship type (see Section 12.3).
Examples:
Simple: position or salary attribute of Staff
Composite: address attribute composed of street, city, and postcode attributes
Single-valued: branchNo attribute of Branch
Multi-valued: telNo attribute of Branch
Derived: duration attribute of Lease, calculated from rentStart and rentFinish
attributes.
You might also like to view...
This provides the network administrator with information regarding the expected normal usage of the network, which type(s) of normal data traffic is expected, what is typical of outbound and inbound Internet data traffic, and who are the “big” data users on the network.
What will be an ideal response?
Configure means to take apart by selecting a specific combination of components, features, and options
Indicate whether the statement is true or false
The height of binary trees can be mathematically predicted.
Answer the following statement true (T) or false (F)
Which of the following takes you from one area of a program (a function) to another area?
A. Branching B. Looping C. Testing D. Dividing