Analysis of relational schemas and normalization Consider the following conceptual schema of a sample database domain that contains information about users, the type of users and the user's account of an application. (i) (ii) name address preferences [0..*] (iii) (iv) USER DOB tel [0..*] email [0..*] NON-REGISTERED 1988 ID ID ID creates UserType * REGISTERED regDate benefit [0..*] USERACCOUNT userName password The following are partially completed collection of relational schemas. USER(name, address, DOB, tel[0..*], email[0..*]) USERACCOUNT (userName, password) NON - REGISTERED (preferences[0..*]) REGISTERED(regDate, benefit [0..*]) ID Find all functional and multivalued dependencies in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. Find all minimal keys in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. List the derivations of all minimal keys. For each one of the relational schemas find the highest normal form a schema is in. List the justifications for each highest normal form found. Decompose all relational schemas that are not in 4NF into 4NF. List all relational schemas obtained from the decompositions. Remember to indicate the primary key and foreign keys (if any)
Analysis of relational schemas and normalization Consider the following conceptual schema of a sample database domain that contains information about users, the type of users and the user's account of an application. (i) (ii) name address preferences [0..*] (iii) (iv) USER DOB tel [0..*] email [0..*] NON-REGISTERED 1988 ID ID ID creates UserType * REGISTERED regDate benefit [0..*] USERACCOUNT userName password The following are partially completed collection of relational schemas. USER(name, address, DOB, tel[0..*], email[0..*]) USERACCOUNT (userName, password) NON - REGISTERED (preferences[0..*]) REGISTERED(regDate, benefit [0..*]) ID Find all functional and multivalued dependencies in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. Find all minimal keys in the relational schemas USER, USERACCOUNT, NON-REGISTERED, and REGISTERED. List the derivations of all minimal keys. For each one of the relational schemas find the highest normal form a schema is in. List the justifications for each highest normal form found. Decompose all relational schemas that are not in 4NF into 4NF. List all relational schemas obtained from the decompositions. Remember to indicate the primary key and foreign keys (if any)
Computer Networking: A Top-Down Approach (7th Edition)
7th Edition
ISBN:9780133594140
Author:James Kurose, Keith Ross
Publisher:James Kurose, Keith Ross
Chapter1: Computer Networks And The Internet
Section: Chapter Questions
Problem R1RQ: What is the difference between a host and an end system? List several different types of end...
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