Couchbase has introduced new data analysis capabilities in its Analytics Service as part of the Couchbase Server 7.0 release, notably the ROLLUP aggregation feature, which helps aggregate data across multiple document attributes by extending the GROUP BY clause. This functionality is particularly useful for creating subtotals and grand totals in data analysis, as demonstrated with an example involving ecommerce sales data categorized by country, region, product, quantity, and price. By utilizing the ROLLUP sub-clause in an N1QL query, users can efficiently generate hierarchical summaries, such as total sales for all countries and regions, sales by country, and sales for individual regions, with enhanced readability through the transformation of NULL values to "All Countries" and "All Regions." This feature aims to streamline data analysis processes and is complemented by forthcoming capabilities like the CUBE function, which will be discussed in future updates.