Which mechanism provides database users with controlled access to the database through the use of virtual tables?
Correct Answer:A
Which term best defines a database system in which data records are stored with no structured relationships between the records?
Correct Answer:A
A theta-join can be viewed as:
Correct Answer:C
Consider the Stu_Act and Act_Fee tables shown in the exhibit. Which relational algebraic operation would yield the Activity Relation table in the exhibit?
Correct Answer:C
Which term best describes one or more database operations that are executed as a single unit?
Correct Answer:B