A Relationship Is An Association Between _____.

Question: Define entity, attribute and relationship

Answer: An entity is an object of interest to the end user. Attributes are characteristics of entities. A relationship is an association between entities.

Question: What are the three types of relationship?

Answer: Relationships may be classified as one-to-one, one-to-many, or many-to-many.

Question: Explain attributes domain

Answer: Attributes have a domain, a domain is the set of possible values for a given attribute. For example, the domain for the grade point average (GPA) attribute is written (0,4) because the lowest possible GPA value is 0 and the highest possible value is 4.

Question: Multivalued

Answer: Multivalued attributes are attributes that can have many values. For instance, a person may have several college degrees, and a household may have several different phones, each with its own number.

Question: Single-valued

Answer: A single-valued attribute is an attribute that can have only a single value. For example, a person can have only one Social Security number, and a manufactured part can have only one serial number.

Donation Page

Support Our Work

Do you appreciate the value this website provides? If so, please consider donating to help keep it running. Your donation will go a long way in helping us continue to provide the same quality of content and services. Every bit helps, and your support is greatly appreciated. Thank you for your generosity.