What is a columnar database?

Question

I have been working with warehousing for a while now.

I am intrigued by Columnar Databases and the speed that they have to offer for data retrievals.

I have mul

Answer 1

kx is another columnar database, for example used in the financial sector. The licence is somewhat $50K last time I checked, though. No optimisation needed, no index needed, because kx has powerful operators (matlab equivalents: .*, kron, bsxfun, ...).