Normalization in SQL | Edureka
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The document explains normalization in database design, which reduces data redundancy and improves data integrity through various normal forms. It discusses the first through fourth normal forms (1NF to BCNF), detailing their requirements and examples. Each normal form addresses specific types of data dependencies to ensure effective database structuring.
Normalization in SQL | Edureka
- 2. • WHAT IS NORMALIZATION? www.edureka.co • 1ST NORMAL FORM (1NF) • 2ND NORMAL FORM (2NF) • 3RD NORMAL FORM (3NF) • BOYCE-CODD NORMAL FORM (BCNF)
- 4. WHAT IS NORMALIZATION? www.edureka.co Processes of reducing the redundancy of Data Improves the Data Integrity
- 5. DATA ANOMALIES www.edureka.co INSERTION UPDATION DELETION
- 6. TYPES OF NORMAL FORM www.edureka.co FIRST NORMAL FORM SECOND NORMAL FORM THIRD NORMAL FORM BOYCE-CODD NORMAL FORM 1NF 2NF 3NF BCNF
- 8. 1ST NORMAL FORM www.edureka.co NORMALIZATION Removes repeating groups from the table Create a separate table for each set of related data Identify each set of related data with a primary key
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- 12. 2nd NORMAL FORM www.edureka.co NORMALIZATION It has to be in 1st Normal Form Table also should not contain partial dependency
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- 16. 3rd NORMAL FORM www.edureka.co NORMALIZATION It has to be in 2nd Normal Form There should be no transitive dependency for non-prime attributes
- 22. Boyce Codd NORMAL FORM (BCNF) www.edureka.co
- 23. BC NORMAL FORM www.edureka.co NORMALIZATION It has to be in 3rd Normal Form Higher version 3NF and was developed by Raymond F. Boyce and Edgar F. Codd Every functional dependency A → B, then A has to be the Super Key of that particular table
- 24. BCNF EXAMPLE www.edureka.co Student ID 1DT15ENG01 1DT15ENG02 1DT15ENG02 1DT15ENG03 1DT15ENG04 Subject SQL JAVA C++ JAVA DBMS Professor Prof. Mishra Prof. Anand Prof. Kanthi Prof. Anand Prof. Lokesh
- 25. BCNF EXAMPLE www.edureka.co Student ID 1DT15ENG01 1DT15ENG02 1DT15ENG02 1DT15ENG03 1DT15ENG04 Subject SQL JAVA C++ JAVA DBMS Professor Prof. Mishra Prof. Anand Prof. Kanthi Prof. Anand Prof. Lokesh
- 26. BCNF EXAMPLE www.edureka.co Student ID 1DT15ENG01 1DT15ENG02 1DT15ENG02 1DT15ENG03 1DT15ENG04 Subject SQL JAVA C++ JAVA DBMS Professor Prof. Mishra Prof. Anand Prof. Kanthi Prof. Anand Prof. Lokesh Professor ID 1DTPF01 1DTPF02 1DTPF03 1DTPF02 1DTPF04 Professor ID 1DTPF01 1DTPF02 1DTPF03 1DTPF02 1DTPF04
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