Data modelling - Technology
RDBMS
(Relational Database Management System)
Software for storing, finding and updating information organised into linked tables
What's it for?
Keeps related business information organised so applications can find, change and connect it reliably.
For example…
PostgreSQL is an RDBMS because it manages relational tables, enforces relationships and lets applications query the data using SQL.
An RDBMS can reject an order row whose CustomerID points to no valid customer, helping keep relationships consistent