Relational Database Design and Modeling for Software Engineers
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Introduction
Course Overview
Before the Advent of Database
Fundamental Concepts
What is a Database?
Database management systems (DBMS)
Overview of Relational Databases
Relational Vs. Non-Relational Databases
Introduction to Data Modeling
Levels of Data Modeling
Data Modeling Process
Best Practices in Data Modeling
Quiz
Introduction to ER Models
Entities, Attributes, and Relationships
Cardinality and Participation
Attributes of Relationship Types
Weak Entity Types
Creating an ER Diagram for Employee Management System
Quiz
Introduction to the Relational Model
Relations, Tuples, and Attributes
Keys in Relational Databases
Relational Integrity Constraints
Converting ER Diagrams to Relational Model
Best Practices for ER Diagrams to Relational Models
Quiz
Introduction to Functional Dependency
Types of Functional Dependencies
Inference Rules for Functional Dependencies
Closure of Attribute Sets
Quiz
Introduction to Normalization
First Normal Form (1NF)
Second Normal Form (2NF)
Third Normal Form (3NF)
Boyce-Codd Normal Form (BCNF)
Higher Normal Forms (4NF, 5NF)
Exercise 1
Solution to Exercise 1
Exercise 2
Solution to Exercise 2
Designing a Hospital Management System
Designing a Hotel Management System
Designing a Bank Management System
Designing an Instagram
Designing an E-commerce Platform
Designing an Online Food Delivery System
Database management systems (DBMS)

A Database Management System (DBMS) is a collection of programs that enable organizations to create, maintain, and manage databases. The primary goal of a DBMS is to provide a reliable environment that allows users to store and retrieve information conveniently and efficiently. By controlling all access to the database, a DBMS ensures data integrity, consistency, and security.

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Key Functions Provided by a DBMS

  1. Defining a Database:

    • Specifies the data types, structures, and constraints for data storage.
    • Lays the groundwork for organized data management by defining tables, columns, and relationships.

  2. Constructing the Database:

    • Involves storing data on storage devices controlled by the DBMS.
    • Supports efficient data structuring for optimal storage and retrieval.

  3. Manipulating the Database:

    • Includes querying the database to retrieve specific data and updating records.
    • Allows users to perform data operations seamlessly using tools like SQL.

  4. Sharing the Database:

    • Supports concurrent data access for multiple users and applications.
    • Ensures data integrity during simultaneous operations through transaction management and concurrency control.

Understanding Database Access

To interact with the database, application programs send queries, or data requests, to the DBMS. These programs provide a user-friendly interface to simplify database interactions for end users. When a query is submitted, the DBMS processes the request and retrieves the requested data from the database.

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Example: Consider a banking system where various departments such as accounting, customer service, and loans need to access shared data. Each department's staff uses application software to request specific data from the DBMS. For instance, an accountant might query the number of outstanding accounts. The DBMS processes this query, retrieves the relevant data from the database, and displays it through the application software.

The Database System

A database system consists of both the database and the DBMS software. This system provides the framework for data management and facilitates data accessibility, modification, and sharing across different applications and users within an organization.

What is a Database?
Overview of Relational Databases
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Key Functions Provided by a DBMS

Understanding Database Access

The Database System