Explanation:BCNF has only one normal form. 9. Thus a _______ of course data gives the values of all attributes, such as title and department, of all courses at a particular point in time.
A. Instance
B. Snapshot
C. Both a and b
D. All of the mentioned
Answer:A
Explanation:BCNF has only one normal form. 9. Thus a _______ of course data gives the values of all attributes, such as title and department, of all courses at a particular point in time.
A. Instance B. Snapshot C. Both a and b D. All of the mentioned
Explanation:We use the term snapshot of data to mean the value of the data at a particular point in time. 10. Representations such as the in the dept year relation, with one column for each value of an attribute, are called _______; they are widely used in spreadsheets and reports and in data analysis tools.