One RDBMS databases is a pool of data.

It contains

• tables (that have fields)
• indeces
• DB functions, triggers and procedures
• DataBase files
• Database Spaces
• and more

can have functions like

• import
• export
• tune
• and more

can run

• in cluster
• in cloud
• in one server with the app
• in different server from the app
• and more

can be

• distributed
• non distributed

can store

• data
• images
• video
• or links to video and images that are on disk
• and more data types

can have

• disaster clone
• or not

can have

• disk backup
• tape backup
• backup from export