What is difference between group by and having?

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Tags

1. #applies
2. #syntax
3. #level
4. #before
5. #after
6. #filter
7. #difference
8. #between
9. #groups
10. #having
11. #later
12. #group
13. #every
14. #clause
15. #where
16. #filtering
17. #former
18. #while