HarvardX: CS50’s Introduction to Databases with SQL course Syllabus

Overview: This course introduces the fundamentals of relational databases and SQL, designed for beginners with an interest in data science, software development, or backend engineering. Through a blend of theory, hands-on practice, and real-world problem sets, learners will master core database concepts and SQL querying. The course is structured into five core modules and a final project, spanning approximately 8–12 weeks with 6–8 hours of study per week. Each module builds progressively from basic principles to advanced querying and design, culminating in practical application through CS50-style problem sets.

Module 1: Databases and SQL Fundamentals

Estimated time: 10 hours

• Understand what databases are and how they differ from spreadsheets
• Learn the structure of tables, rows, columns, and keys
• Write basic SQL queries using SELECT, INSERT, UPDATE, and DELETE
• Perform CRUD operations to manage data in relational databases

Module 2: Relational Design and Normalization

Estimated time: 14 hours

• Design normalized database schemas to reduce redundancy
• Define primary keys and foreign keys to establish table relationships
• Apply normalization principles for data consistency
• Model real-world entities using relational schema design

Module 3: Advanced Queries and Joins

Estimated time: 14 hours

• Use INNER JOIN and LEFT JOIN to combine data from multiple tables
• Write nested queries and subqueries for complex data retrieval
• Aggregate data using GROUP BY and HAVING clauses
• Query real-world-style datasets efficiently and accurately

Module 4: Indexes, Constraints, and Transactions

Estimated time: 14 hours

• Learn how indexes improve query performance
• Apply constraints such as UNIQUE, NOT NULL, and CHECK for data integrity
• Understand transactions, atomicity, and concurrency control
• Ensure reliable and secure database operations

Module 5: Applied Database Problem Sets

Estimated time: 16 hours

• Solve practical database challenges inspired by real applications
• Strengthen SQL query-writing and schema-design skills
• Debug and optimize queries for production-like scenarios
• Apply relational design and querying techniques to real datasets

Module 6: Final Project

Estimated time: 20 hours

• Design a complete relational database schema from requirements
• Implement the schema using SQL with proper keys and constraints
• Write complex queries to retrieve and analyze data

Prerequisites

• Familiarity with basic computer operations
• No prior programming experience required, but comfort with technical concepts is helpful
• Willingness to engage in consistent practice and problem-solving

What You'll Be Able to Do After

• Explain how relational databases work and why they are essential in modern systems
• Create, read, update, and delete data using SQL (CRUD operations)
• Design efficient and normalized database schemas using primary and foreign keys
• Write complex SQL queries involving joins, subqueries, aggregations, and constraints
• Apply database concepts to real-world problems and production-like environments