I couldn't find anything on Google or on here about best practice for data that is not really Wordpress related.
Say we have a database of clients that we'll be accessing through PHP/SQL. Should I just create new tables within the wordpress database or is it good practice to keep these in completely separate databases?
Currently its very basic and was actually being done as an external CSV. Moving forward though we want it to be a database and eventually clients will have a login area as well.