Match each of the key terms with the definition that best fits it.

_____________ A special field value, distinct from 0, blank, or any other value, that indicates that the value for the field is missing or otherwise unknown.

Here are the key terms from the chapter. The page where each term is first explained is in parentheses after the term.

1. Calculated (or computed or derived) field

2. Data type

3. Default value

4. Denormalization

5. Field

6. File organization

7. Foreign key

8. Functional dependency

9. Hashed file organization

10. Homonym

11. Index

12. Indexed file organization

13. Input mask

14. Normalization

15. Null value

16. Physical file

17. Physical table

18. Pointer

19. Primary key

20. Recursive foreign key

21. Referential integrity

22. Relation

23. Relational database model

24. Second normal form (2NF)

25. Secondary key

26. Sequential file organization

27. Synonyms

28. Third normal form (3NF)

29. Well-structured relation (or table)