Jan 27, 2011 · You should use ROLLUP if you want your data hierarchically and CUBE if you want all possible combinations. For example, if you want to retrieve the total population of a country, state and city.

Dec 29, 2023 · ROLL UP performs aggregation on a set of columns, generating subtotals and grand totals along a specified hierarchy. CUBE performs aggregation on the dimensions given in the CUBE (). It only generates grouping sets based on hierarchy of column chosen. It gives the subset (2^n) grouping sets, where n is the columns mentioned in the cube.

ROLLUP and CUBE make it possible for values to be aggregated on several different axes satisfying more detailed reporting needs. ROLLUP summarizes against a hierarchy of columns used in the GROUP BY clause. CUBE groups by all combinations of the values.

Feb 5, 2025 · In addition, the GROUP BY can also be used with optional components such as Cube, Rollup and Grouping Sets. In this tip, I will demonstrate various ways of building a GROUP BY along with output explained. When building queries …

Sep 27, 2022 · cube is equivalent to CUBE extension to GROUP BY. It takes a list of columns and applies aggregate expressions to all possible combinations of the grouping columns. Lets say you have data like this: and you compute cube(x, y) with count as an aggregation: A similar function to cube is rollup which computes hierarchical subtotals from left to right:

ROLLUP and CUBE are simple extensions to the SELECT statement's GROUP BY clause. ROLLUP creates subtotals at any level of aggregation needed, from the most detailed up to a grand total. CUBE is an extension similar to ROLLUP, enabling a single statement to calculate all possible combinations of subtotals.

Dec 1, 2014 · CUBE generates a result set that shows aggregates for all combinations of values in the selected columns. ROLLUP generates a result set that shows aggregates for a hierarchy of values in the selected columns. So, I decided to replace the ROLLUP in my query with CUBE to see what would happen. They produced the same results.

Including the GROUP BY clause limits the window of data processed by the aggregate function. This way we get an aggregated value for each distinct combination of values present in the columns listed in the GROUP BY clause.

Aug 13, 2014 · ROLLUP and CUBE operators generate some of the same result sets and perform some of the same calculations as OLAP applications. The CUBE operator generates a result set that can be used for cross tabulation reports.

Jan 3, 2025 · 1. Roll-Up or Drill Up Operation. Roll-up is an aggregation operation that summarizes data by climbing up a concept hierarchy or by dimension reduction. It’s like zooming out to see a broader view. Example: Sales data cube with dimensions: Location (City), Time (Month), and Product.