Why do we use materialized view in Oracle?

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Tags

1. #query
2. #rewrite
3. #these
4. #aggregations
5. #processing
6. #refreshed
7. #materialized
8. #large
9. #between
10. #expensive
11. #tables
12. #terms
13. #determines
14. #views
15. #power
16. #queries
17. #create
18. #joins
19. #often
20. #involve
21. #databases
22. #operations