Really impressive how simple it is to create a Data Mart and be analyzed with reports, OLAP cubes and Dashboards in a matter of minutes using
LinceBI
The best thing is that you can do it with a solution based on open source, without cost of licenses and with professional support guaranteed.
A good alternative at no license cost to PowerBI, Tableau, Qliksense...
You can try more in detail in this
online demo
and check this '8 minutes Data Mart and Analysis ready to go'