Which is More Better?
ROLLUP is generally more efficient than CUBE because it calculates subtotals based on a specific hierarchy and ROLL UP with multiple columns gives hierarchy among the GROUPBY clause . It is also used with GROUPING() clause to return 1 for NULL or 0.CUBE involves more computation due to considering all possible combinations and increases the space and time complexities.
Difference Between Cube and Rollup in SQL Server
In SQL Server, both ROLLUP and CUBE are sub-clause of the GROUP BY clause and are used in conjunction with aggregate functions to produce summary reports. It helps to generate multiple group sets using the hierarchy. To enhance the capabilities of grouping and aggregation, SQL Server provides two powerful extensions: CUBE and ROLLUP. These extensions allow for the creation of more sophisticated and multi-dimensional summaries of data.