What is coalesce in PostgreSQL?

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  1. #function
  2. #returns
  3. #often
  4. #substitute
  5. #value
  6. #display
  7. #arguments
  8. #default
  9. #select
  10. #short
  11. #example
  12. #coalesce
  13. #returned
  14. #values
  15. #retrieved
  16. #description
  17. #first