9. The following statements are true for aggregates.
a. An aggregate stores data of an info cube redundantly and persistently in a summarized form in the database.
b. An aggregate can be built on characteristics or navigational attributes from the info cube.
c. Aggregates enable queries to access data quickly for reporting.
d. None of the above.
ANSWER(S): A, B, C
Aggregates summarize and store data from an info cube. Characteristics and navigational attributes of an info cube can be used to create aggregates. Since aggregates contain summarized data, the amount of data in aggregates will be much less that the cube which makes the queries to run faster when they access aggregates.