Why is relational DBMS so powerful?

Related questions

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3. What is relational database in DBMS?
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5. What is difference between SQL and My SQL?
6. Why is Rdbms important?
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Tags

1. #systems
2. #assumptions
3. #related
4. #about
5. #database
6. #feature
7. #different
8. #result
9. #databases
10. #extracted
11. #require
12. #relational
13. #spread
14. #several
15. #tables
16. #viewed
17. #because
18. #important
19. #across
20. #single
21. #powerful