Informally describe the conditions to be met for a relation to be in Second Normal Form. In terms of functional dependency, describe why the following CUSTOMER_PURCHASE relation is not in second normal form. This table describes every instance of an individual Customer purchasing a Product. How would this relation suffer from Update Anomalies? CUSTOMER_PURCHASE (CUSTOMER_ID, PRODUCT_ID, PURCHASE_DATE, PURCHASE_AMT, PRODUCT_DESCRIPTION, CUSTOMER_NAME) Note the relation’s primary key is underlined

Informally describe the conditions to be met for a relation to be in Second Normal Form. In terms of functional dependency, describe why the following CUSTOMER_PURCHASE relation is not in second normal form. This table describes every instance of an individual Customer purchasing a Product. How would this relation suffer from Update Anomalies? CUSTOMER_PURCHASE (CUSTOMER_ID, PRODUCT_ID, PURCHASE_DATE, PURCHASE_AMT, PRODUCT_DESCRIPTION, CUSTOMER_NAME) Note the relation’s primary key is underlined

Oracle 12c: SQL

3rd Edition

ISBN:9781305251038

Author:Joan Casteel

Publisher:Joan Casteel

Chapter4: Constraints

Section: Chapter Questions

Problem 1RQ: What is the difference between a PRIMARY KEY constraint and a UNIQUE constraint?

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