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4. Consider relation Presidents representing US presidents. Suppose that the following business rules hold: 1. No two presidents have the same name and year of birth 2. No two presidents have the same inauguration date 3. All presidents have a name and a year of birth, and have been inaugurated into office 4. Not all presidents are affiliated with a political party Which of the following is a valid create table statement for relation Presidents? create table Presidents ( name varchar(128) primary key, year_of_birth number not null, inauguration_date date unique, party varchar(32) b) create table Presidents ( name varchar(128), year_of_birth number, inauguration_date date not null, party varchar(32), primary key (name, year_of_birth) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date not null unique, party varchar(32), unique (name, year_of_birth) d) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date primary key, party varchar(32), unique (name, year_of_birth)

4. Consider relation Presidents representing US presidents. Suppose that the following business rules hold: 1. No two presidents have the same name and year of birth 2. No two presidents have the same inauguration date 3. All presidents have a name and a year of birth, and have been inaugurated into office 4. Not all presidents are affiliated with a political party Which of the following is a valid create table statement for relation Presidents? create table Presidents ( name varchar(128) primary key, year_of_birth number not null, inauguration_date date unique, party varchar(32) b) create table Presidents ( name varchar(128), year_of_birth number, inauguration_date date not null, party varchar(32), primary key (name, year_of_birth) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date not null unique, party varchar(32), unique (name, year_of_birth) d) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date primary key, party varchar(32), unique (name, year_of_birth)

Database System Concepts
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Subject: MYSQL

4. Consider relation Presidents representing US presidents. Suppose that the following business rules hold: 1. No two presidents have the same name and year of birth 2. No two presidents have the same inauguration date 3. All presidents have a name and a year of birth, and have been inaugurated into office 4. Not all presidents are affiliated with a political party Which of the following is a valid create table statement for relation Presidents? а) create table Presidents ( name varchar(128) primary key, year_of_birth number not null, inauguration_date date unique, party varchar(32) b) create table Presidents ( name varchar(128), year_of_birth number, inauguration_date date not null, party varchar(32), primary key (name, year_of_birth) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date not null unique, party varchar (32), unique (name, year_of_birth) d) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date primary key, party varchar(32), unique (name, year_of_birth)
Transcribed Image Text:4. Consider relation Presidents representing US presidents. Suppose that the following business rules hold: 1. No two presidents have the same name and year of birth 2. No two presidents have the same inauguration date 3. All presidents have a name and a year of birth, and have been inaugurated into office 4. Not all presidents are affiliated with a political party Which of the following is a valid create table statement for relation Presidents? а) create table Presidents ( name varchar(128) primary key, year_of_birth number not null, inauguration_date date unique, party varchar(32) b) create table Presidents ( name varchar(128), year_of_birth number, inauguration_date date not null, party varchar(32), primary key (name, year_of_birth) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date not null unique, party varchar (32), unique (name, year_of_birth) d) create table Presidents ( name varchar(128) not null, year_of_birth number not null, inauguration_date date primary key, party varchar(32), unique (name, year_of_birth)
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