I am interested in knowing the differences in functionality between SAP HANA and Exasol. Since this is a bit of an open ended question let me be clear. I am not interested in people debating which is "better" or faster. I am only interested in what each was designed to do so please keep your opinions out of it. I suspect it is a bit like comparing HANA to Oracle Exalytics where there is some overlap but the functionality goals are different.
There's not an enormous difference between what you can do with the two databases, it's more a question of the focus and the way the functionality is implemented and that's where it becomes difficult to explain without using words like "better" and "faster" (and for sure words like "cheaper")
EXASOL was designed for speed and ease of use with Analytical processing and is designed to run on clusters of commodity hardware. SAP is a more complex, aims to do more than "just" Analytical processing and runs only on a range of "approved" hardware.
What type of differences did you have in mind ?