This week we learned that businesses can try to extract more use out of the data that they have collected in their databases over the years. The technology which allows them to do this belong under the category or umbrella called "B.I.".
Unlike query and reporting tools in regular databases, BI tools can help users find previously unknown patterns and trends in their data, or it can help them perform ad-hoc queries and comparisons on large amounts of current and historical data. BI is not meant for daily operational use but it is meant for decision-support and analytical use.
Here's a link to a demo of an OLAP cube. Try to query the cube along multiple dimensions to see how easy it is to gain insights from a data warehouse.
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