Lecture8 Normalization Aggarwal

Chapter 5 ,[object Object],[object Object]

Learning Objectives ,[object Object],[object Object],[object Object],[object Object],[object Object]

Normalization ,[object Object],[object Object],[object Object]

Is Normalization Necessary? ,[object Object],[object Object]

Anomalies ,[object Object],[object Object],[object Object]

Normalization Process ,[object Object],[object Object],[object Object],[object Object]

Dependency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

The Need for Normalization ( continued ) ,[object Object],[object Object],[object Object]

1 st NF ,[object Object],[object Object],[object Object]

A Dependency Diagram: First Normal Form (1NF)

Second Normal Form (2NF) Conversion Results

Third Normal Form (3NF) Conversion Results

Un-normalized form ,[object Object],[object Object],[object Object]

[object Object],[object Object]

Another Way ,[object Object],[object Object],[object Object],Part_NO P-DESC V_NAME V_ADDRESS UNIT_COST

1 st NF ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

2 nd NF ,[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

[object Object],[object Object],[object Object]

Remove Partial Dependency ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

3rd NF ,[object Object],[object Object]

[object Object],[object Object],[object Object],[object Object],[object Object]

Q6/p 184 ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Q8/P187 Table P5.8 Sample ITEM Records May B. Next I. B. Rightonit I. B. Rightonit BLDG_MANAGER Canseefar Nottoclear Nottooclear BLDG_NAME CSF NTC NTC BLDG_CODE 123 325 325 ROOM_NUMBER DT Scanner HP Toner HP DeskJet 895Cse ITEM_LABEL 254668-449 342245-225 231134-678 ITEM_ID Sample Value Sample Value Sample Value Attribute Name

ITEM_DESCRIPTION BLDG_CODE BLDG_NAME BLDG_MANAGER ITEM_ID BLDG_ROOM Problem 8 Solution

ITEM_DESCRIPTION BLDG_CODE BLDG_NAME EMP_FNAME EMP_INITIAL BLDG_NAME BLDG_MANAGER BLDG_CODE EMP_CODE EMP_LNAME Problem 9 Solution: All tables in 3NF ITEM_ID BLDG_ROOM ITEM_DESCRIPTION ITEM_ID BLDG_ROOM BLDG_CODE EMP_CODE

Denormalization ,[object Object],[object Object],[object Object]

Convert into 3NF ,[object Object],[object Object]

Lecture8 Normalization Aggarwal

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Lecture8 Normalization Aggarwal