RDBMS is a super set of DBMS plus some more features.
Consolidated few differences here.
| DBMS | RDBMS | |
| Organization, storage, management, and retrieval of data | Yes | Yes |
| Flat file design | Yes | No |
| Relational design | No | Yes |
| Password protection | Yes | Yes |
| Enforce referential integrity | No | Yes |
| Null or blank data management | Yes | Yes |
| Meta data support | Yes | Yes |
| Support relatively large set of data | No | Yes |
| Support complex business applications | No | Yes |
Microsoft Access is an example of DBMS.
Oracle, Microsoft SQL Server, DB2 are few examples for RDBMS.
