What SQL commands are used to build the attached tables with the proper attributes, data types, primary keys, foreign keys, relationships, and constraints?
What SQL commands are used to build the attached tables with the proper attributes, data types, primary keys, foreign keys, relationships, and constraints?
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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Transcribed Image Text:What SQL commands are used to build the attached tables with the proper attributes, data types,
primary keys, foreign keys, relationships, and constraints?
PK
SCHOOL
SCHOOL CODE
(1,1) (0,N)
---has-- *
PK
PK
DEPARTMENT
(1,1)
employs
(1,N)
PROFESSOR
PROF NUM
FK DEPARTMENT_ID
PROF LASTNAME
PROF FIRSTNAME
teaches
(1,1)
Expert Solution
Step 1
Their are three tables-
SCHOOL,DEPARTMENT and PROFESSOR
SCHOOL has attributes- SCHOOL_CODE and DEPARTMENT_ID
SCHOOL_CODE is Primary key
DEPARTMENT_ID is Foreign key and it references to DEPARTMENT_ID of DEPARTMENT table.
Their can be zero or many Departments in School.
DEPARTMENT has attributes DEPARTMENT_ID and DEPARTMENT_NAME
DEPARTMENT_ID is Primary key
Their can be one or more professor in a Department.
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