Before revision:  We demonstrate the expressivity of Sigma Worksheet with several usage examples and report on its accessibility through user feedback we elicited since its deployment. Our user feedback suggests that Sigma Worksheet provides an easier to use and learn interface for data warehouses, improving the  data analysis and exploration experience for both expert and non-expert enterprise users  .
After revision:  We demonstrate the expressivity of Sigma Worksheet with several usage examples and report on user feedback that we elicit through a 100-person survey followed by a semi-structured interview study with 70 participants. We find that Sigma Worksheet provides an easier to use and learn interface for data warehouses, improving the data analysis and exploration experience for both expert and non-expert enterprise users .