What Does Operational Database (ODB) Mean?

An operational database is a database that is used to manage and store data in real time. An operational database is the source for a data warehouse. Elements in an operational database can be added and removed on the fly. These databases can be either SQL or NoSQL-based, where the latter is geared toward real-time operations.

Techopedia Explains Operational Database (ODB)

An operational database is a database that stores data inside of an enterprise. They can contain things like payroll records, customer information and employee data. They are critical to data warehousing and business analytics operations.