What are the main differences between PostgreSQL and MySQL?

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1. #oracle
2. #source
3. #global
4. #governance
5. #group
6. #postgres
7. #between
8. #differences
9. #postgresql
10. #license
11. #mysql
12. #technologies
13. #development
14. #database
15. #model
16. #controlled
17. #around
18. #whereas
19. #under
20. #available
21. #significant