More than 1.5 million professionals now use Cognos Impromptu for enterprise/data warehouse reporting -- and this is the first complete guide to helping them take full advantage of it! Business intelligence expert Brian Olah walks users step-by-step through every key technique for both standard and ad hoc reporting. The book's detailed coverage goes far beyond the documentation, helping users find the Impromptu answers they need immediately -- so they can gain the business insight they desperately need, faster than ever. After a brief overview of the Impromptu product family and software installation, Olah demonstrates how to work with existing reports and the Impromptu user interface; then create and format basic reports. In Part II, he introduces the key building blocks of more sophisticated reports: filtering, calculations and functions, sorting, grouping, sums, subtotals, and totals. Then, using detailed, hands-on examples, he presents power-user Impromptu techniques, including prompting for results, advanced formatting, drill-through, crosstabs, subreports, and more.