What is the purpose of normalization in logical design?
1 Chapter 4 Normalization 2 Data Normalization • Formal process of decomposing relations with anomalies to produce smaller, well- structuredand stablerelations • Primarily a tool to validate and improve a logical design so that it satisfies certain constraints that avoid unnecessary duplication of data 2 3 Well-Structured Relations
How to identify a candidate key for normalization?
Draw a relational schema for PART SUPPLIER and show the functional dependencies. Identify a candidate key. 3. Identify each of the following: an insert anomaly, a delete anomaly, and a modification anomaly. 15 8 16 Second Normal Form (2NF) • 1NF PLUS every non-key attribute is fully functionally dependent on the ENTIRE primary key
How to do practice exercise 7 in 1NF?
Practice Exercise #7, page #193 1. Convert this table to a relation (named PART SUPPLIER) in 1NF 2. Draw a relational schema for PART SUPPLIER and show the functional dependencies. Identify a candidate key. 3. Identify each of the following: an insert anomaly, a delete anomaly, and a modification anomaly.
What is the rule for first normal form?
The rule for first normal form (1NF) is a table in which the intersection of every column and record contains only one value. In other words a table that contains more than one atomic value in the intersection of one or more column for one or more records is not in 1NF.
How to normalize a part supplier in 1NF?
1. Convert this table to a relation (named PART SUPPLIER) in 1NF 2. Draw a relational schema for PART SUPPLIER and show the functional dependencies. Identify a candidate key. 3. Identify each of the following: an insert anomaly, a delete anomaly, and a modification anomaly. 15 8 16 Second Normal Form (2NF)
How to normalize a table with multivalued attributes?
6 Table with Multivalued attributes First normal form (1NF) Second normal form(2NF) Boyce-Codd normal form (BC-NF) Fourth normal Form (4NF) Fifth normal form (5NF) Remove Multivalued Attributes