But sometimes, your line-of-business application does analytics queries. Which means you need your app developers to understand how to do OLAP, and you also nee

But sometimes, your line-of-business application does analytics queries. Which means you need your app developers to understand how to do OLAP, and you also need a schema design that can run arbtrary OLAP queries within a few orders of magnitude of OLTP speeds (e.g. <10s.)