Before revision:  Sigma Worksheet enables users to perform powerful interactive ad-hoc visual data analysis without writing queries. To thisend, it combines the notion of a multidimensional data cube with an expressive, spreadsheet-like query construction interface , in order to ease the generation of otherwise complex queries.
After revision:  Sigma Worksheet enables users to perform powerful interactive ad-hoc visual analysis of data in CDWs at scale. For this, Sigma Worksheet provides an accessible spreadsheet-like query construction interface , in order to ease the generation of otherwise complex queries.