The OLAP Cube Shown in the Figure Below Has Been

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The Answer is The ROLLUP and CUBE extensions to GROUP BY generate OLAP-type summaries of the data with subtotals and totals. The columns to be defined are defined similarly to how grouping sets can define GROUP BY columns. ROLLUP generates subtotal and total rows for the GROUP BY columns. CUBE extends the capabilities by generated subtotal rows for every combination of GROUP BY columns. ROLLUP and CUBE also generate a grand total row.
A simple example of a ROLLUP query is shown below:
SELECT a, b, c, sum(x)
FROM t
GROUP BY ROLLUP (a,b,c)
Produces aggregates of x for (a,b,c), (a,b), a, (grand total)
A simple example of a CUBE query is shown below:
SELECT a, b, c, sum(x)
FROM t
GROUP BY CUBE (a,b,c)
Produces aggregates of x for (a,b,c), (a,b), (a,c), a, (b,c), b, c, (grand total). The rows that are produced by ROLLUP and CUBE are shown in bold.

The OLAP Cube Shown in the Figure Below Has Been

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The OLAP Cube Shown in the Figure Below Has Been

Essay

Correct Answer:VerifiedShow Answer

Correct Answer:
Verified