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Database Design for a University Organization

Abstract

An entity relationship diagram (ERD), also known as an entity relationship model, is a graphical representation that depicts relationships among people, objects, places, concepts or events within an information technology (IT) system. We have to design database design for a university Organization as per the requirement.

Steps to create ERD

SQL to create tables and relationship

DROP TABLE IF EXISTS dbo.SECTION;
DROP TABLE IF EXISTS dbo.COURSES;
DROP TABLE IF EXISTS dbo.STUDENTS;
DROP TABLE IF EXISTS dbo.INSTRUCTORS;
DROP TABLE IF EXISTS dbo.DEPARTMENTS;
DROP TABLE IF EXISTS dbo.CLASSROOMS;



CREATE TABLE CLASSROOMS (
	dept_building INT NOT NULL PRIMARY KEY,
	dept_room_number varchar(50),
	dept_room_capacity INT NOT NULL,
);

CREATE TABLE DEPARTMENTS (
	dept_name INT NOT NULL PRIMARY KEY,
	dept_building INT NOT NULL,
	dept_budget INT,
	FOREIGN KEY(dept_building) REFERENCES dbo.CLASSROOMS(dept_building)	
);

CREATE TABLE INSTRUCTORS (
	dept_name INT NOT NULL,
	instructor_id INT NOT NULL,
	instructor_name varchar(50),
	instructor_salary INT,
	FOREIGN KEY(dept_name) REFERENCES dbo.DEPARTMENTS(dept_name)	
);

CREATE TABLE STUDENTS (
	dept_name INT NOT NULL,
	student_id INT NOT NULL,
	student_name varchar(50),
	student_total_credit INT,
	FOREIGN KEY(dept_name) REFERENCES dbo.DEPARTMENTS(dept_name)	
);

CREATE TABLE COURSES (
	dept_name INT NOT NULL,
	Course_id  INT NOT NULL PRIMARY KEY,
	Course_title varchar(50),
	Course_credits INT,
	Course_prerequisites varchar(50),
	FOREIGN KEY(dept_name) REFERENCES dbo.DEPARTMENTS(dept_name)	
);

CREATE TABLE SECTION (
	Course_id  INT NOT NULL,
	Section_id INT NOT NULL,
	Section_year INT,
	Section_semester varchar(50),
	FOREIGN KEY(Course_id) REFERENCES dbo.COURSES(Course_id)	
);

ERD Diagram

SQL - Insert data into one table (Step 1)

SQL - Select data to display the record (Step 2)

Try to insert all the data into each table using step 1 and step 2