What are PlusClouds' opinions on database selection recommendations?

The suggestions can vary depending on the resources and content of the relevant project. PlusClouds is creating its own space through open-source codes. However, Oracle has not yet proposed a suitable user profile.

Suggestions:
A database running in RAM.
If something is used for cash and memory, then NoSQL.
If it is stored on a more stable hard drive, then for more static content, NoSQL.
As a service, poster SQL is ready, MySQL will come.