Normalization
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Normalization

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  • 1. Nittaya Wongyai
  • 2. Normalization Normalization Normal Form 3  1 1NF  2 2NF E.F.Codd  3 3NF  Boyce/Codd Normal Form BCNF  4 4NF Fagin  5 5NF
  • 3. Normalization
  • 4. ER-to-Relational Mapping Algorithm Strong Entity (PK) P1101 6 990 P1102 199
  • 5. ER-to-Relational Mapping Algorithm PK J1101 2554 Weak Entity J1102 2554 FK) J1101 J1102
  • 6. PK550987786 Associative550987787 Entity (FK) (FK)550987786 LSIT1111 89 A550987787 LSIT1113 49 F PK LSIT1111 LSIT1113
  • 7. The Process of Normalization: First Normal Form 1NF 1NF Atomic 1 Repeating groups
  • 8. The Process of Normalization: First Normal Form 1NF
  • 9. The Process of Normalization: Second Normal Form 2NF 2NF 1NF (Primary key) Composite key Partial Dependency
  • 10. The Process of Normalization: Second Normal Form 2NF1NF2NF
  • 11. 2 NF
  • 12. The Process of Normalization: Third Normal Form 3NF 3NF 2NF Transitive Dependency
  • 13. The Process of Normalization: Third Normal Form 3NF2NF3NF
  • 14. Boyce-Codd Normal Form(BCNF) (Candidate key) 2
  • 15. BCNF
  • 16. The Process of Normalization: Fourth Normal Form 4NF BCNF Multivalued Dependencies (MVDs)  3  2
  • 17. BCNF 4NF
  • 18. BCNF4NF
  • 19. The Process of Normalization: Fifth Normal Form 5NF 4NF Join Dependency
  • 20. 5 NF
  • 21. 5 NF