Question $3$:

$[$CLOSI$[15$ Marks$]$

A retail company wants to analyze the sales performance of its products across various regions and store types. The goal is to calculate the total sales for each combination of region and store type, along with subtotals for each region, each store type, and the overall grand total.

$3\mathrm{.}1$ Using the provided table, what is the output of the following query? $(5$ marks$)$

A$)$ SELECT region$\_$id$,$ store type, SUM$($sales$\_$amount$)$ AS total$\_$sales

FROM sales$\_$performance

GROUP BY CUBE$($region$\_$id$,$ store$\_$type$)$;

B$)$ If you have $\backslash (\backslash$mathbf$\{$N$\}\backslash )$ dimensions, the number of combinations $($including subtotals and grand totals$)$ generated by a CUBE operation is: