Main RDBMS advantages:
- Tables are related to each other
- SQL query/data processing language
- Transaction processing addition to SQL (Transact-SQL)
- Server-client implementation with server-side objects like stored procedures, functions, triggers, views, etc.
Advantage of the File System over Data base Management System is:
When handling small data sets with arbitrary, probably unrelated data, file is more efficient than database. For simple operations, read, write, file operations are faster and simple.