Identificacion De Las Llaves Foraneas
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The document defines the tables and relationships in a database for a university management system. It includes tables for areas, faculty, programs, courses, blocks, classrooms, students, and course prerequisites. Foreign keys are defined to link the tables together and enforce referential integrity. SQL code is provided to create the tables and constraints.
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The document defines the tables for a university database including tables for areas, professors, programs, classrooms, courses, prerequisites, and their relationships. Tables are created for area, professor, program, classroom, course, prerequisites, and junction tables to represent relationships between the entities. Primary and foreign keys are defined to enforce relational integrity.
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DESCRIPTION VARCHAR(60),
CREDITS INT,
CONSTRAINT pk PRIMARY KEY (COURSE));
CREATE TABLE OFFERINGS
( CRN INT,
COURSE VARCHAR(6),
SECTION VARCHAR(2),
DATES VARCHAR(5),
TIMES VARCHAR(30),
INSTRUCTOR VARCHAR(30),
ROOM VARCHAR(20),
ENROLLMAX INT,
ENROLLCURRENT INT,
CONSTRAINT pk2 PRIMARY KEY (CRN),
CONSTRAINT fk1 FOREIGN KEY (COURSE) REFERENCES COURSES (COURSE));
CREATE TABLE STUDENTS
( USERID VARCHAR(9),
PASSWORD VARCHAR(10),
FIRSTNAME VARCHAR(20),
LASTNAME VARCHAR(30),
PHONE VARCHAR(12),
DOB VARCHAR(40),
MAJOR VARCHAR(20),
ADDRESS VARCHAR(30),
CITY VARCHAR(30),
STATE VARCHAR(2),
ZIP VARCHAR(5),
CONSTRAINT pk3 PRIMARY KEY (USERID));
CREATE TABLE ENROLLMENTS
( CRN INT,
USERID VARCHAR(9),
ENROLLDATE VARCHAR(30),
GRADE VARCHAR(2),
CONSTRAINT pk4 PRIMARY KEY(CRN, USERID),
CONSTRAINT fk2 FOREIGN KEY (CRN) REFERENCES OFFERINGS(CRN),
CONSTRAINT fk3 FOREIGN KEY (USERID) REFERENCES STUDENTS(USERID));
INSERT INTO STUDENTS VALUES
('111111111', 'secret1', 'Joan','Green','518-434-5940','March 10, 1987','Biology','10 First Street','Albany','NY','12203');
INSERT INTO STUDENTS VALUES
('222222222','secret2', 'Jill','Black','518-389-4029','April 23, 1988','Mathematics','20 Second Street','Albany','NY','12204');
INSERT INTO STUDENTS VALUES
('333333333','secret3', 'Jim','White','518-493-4950','June 30, 1986','Computer Science','30 Third Street','Albany','NY','12205');
INSERT INTO STUDENTS VALUES
('444444444','secret4', 'Jane','Gray','518-583-0934','February 13, 1985','Computer Science','40 Fourth Street','Albany','NY','12206');
INSERT INTO STUDENTS VALUES
('555555555','secret5', 'Joe','Brown','518-589-3940','January 2, 1986','Computer Science','50 Fifth Street','Albany','NY','12207');
INSERT INTO STUDENTS VALUES
('666666666', 'secret6', 'Jackie', 'Blue','518-485-3923','March 23, 1987','Computer Science','60 Sixth Street','Albany','NY','12208');
INSERT INTO STUDENTS VALUES
('777777777', 'secret7', 'Judy', 'Purple','518-548-3049','September 2, 1988','Computer Science','70 Seventh Street','Albany','NY','12209');
INSERT INTO COURSES VALUES('CIS111','Introduction to Computer Science',3);
INSERT INTO COURSES VALUES('CIS202','Computer Science 1',4);
INSERT INTO COURSES VALUES('CIS203','PC Organization and Operation',3);
INSERT INTO COURSES VALUES('CIS204','Educational Computing',3);
INSERT INTO COURSES VALUES('CIS205','Windows Programming 1',3);
INSERT INTO COURSES VALUES('CIS302','Computer Science 2',4);
INSERT INTO COURSES VALUES('CIS305','Windows Programming 2',3);
INSERT INTO COURSES VALUES('CIS311','Computer Graphics',3);
INSERT INTO COURSES VALUES('CIS321','Database Management Systems',4);
INSERT INTO COURSES VALUES('CIS322','Microcomputer Architecture',3);
INSERT ...
Taller4
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Taller4
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