When would you use GROUP BY ROLLUP clause in your OLAP query?

When would you use GROUP BY ROLLUP clause in your OLAP query?
A . where all subtotals and grand totals are to be included in the output
B . where only the subtotals are to be included in the output
C . where only the grand totals are to be included in the output
D . where only specific subtotals and grand totals for a combination of variables are to be included in the output

View Answer

Answer: A