Can string be a primary key?

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Tags

1. #integers
2. #sometimes
3. #automatically
4. #numerical
5. #table
6. #columns
7. #which
8. #faster
9. #extra
10. #incremented
11. #primary
12. #reasons
13. #field
14. #improves
15. #integer
16. #string
17. #though
18. #tables
19. #performance
20. #identity