There must be more than one data base creation option for one application. some times we have to create more than one database for few operations in Magento 2 but working on cloud ways we have to go far long way for it by installing another app which definitely overload server and result increase of cost if resource is increased or if resource is not increased then performance decline is the consequence.

for example a Magento developer or user want to use a theme quick start pack he has to create a new data base and what if he already has Magento 2 installed and has a big string of database what the other option exists?

Any advise is welcome for the increase of my knowledge and ease of work.