What kind of attribute would be given for a person who does not have an email address?
Which of the following is a possible business rule?
*All of these.
A DVD title can have many copies.
A customer can purchase many DVDs.
DVDs can be purchased by many customers.
Which of the following is a type of attribute?
*All of these
What is a characteristic of a table?
What has only a single value of each attribute of an entity?
What kind of attribute is assigned to an attribute when no other value applies or when a value is unknown?
What kind of attribute would be age?
What occurs between two entities in which an instance of one entity can be related to only one instance of a related entity?
What is a statement that defines an aspect of a business?
What is a technique for documenting the entities and relationships in a database environment?
What is a collection of related data elements?
Which of the following statements is accurate?
Each business rule will have entities and sometimes even attributes.
A typical business may have hundreds of business rules.
*All of these.
A correct business rule for one organization may not be correct for another organization.
What kind of attribute would be date of birth?
What exists to represent the relationship between two other entities?
What is composed of rows and columns that represent an entity?
What occurs between two entities in which an instance of one entity can be related to many instances of a related entity?
What is a foreign key?
A primary key of one table that appears as an attribute in another table and acts to provide a logical relationship between the two tables
What occurs when two entities can be related to each other in many instances?
What kind of attribute can be calculated using the value of another attribute?
What is a primary key?
A field that uniquely identifies a given record in a table
What expresses the specific number of instances in an entity?
What has the potential to contain more than one value for an attribute?
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