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Harvard University

CS50's Introduction to Databases with SQL

Harvard University via edX

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Overview

This is CS50's introduction to databases using a language called SQL. Learn how to create, read, update, and delete data with relational databases, which store data in rows and columns. Learn how to model real-world entities and relationships among them using tables with appropriate types, triggers, and constraints. Learn how to normalize data to eliminate redundancies and reduce potential for errors. Learn how to join tables together using primary and foreign keys. Learn how to automate searches with views and expedite searches with indexes. Learn how to connect SQL with other languages like Python and Java. Course begins with SQLite for portability's sake and ends with introductions to PostgreSQL and MySQL for scalability's sake as well. Assignments inspired by real-world datasets.

Taught by

David J. Malan and Carter Zenke

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Reviews

4.8 rating, based on 4 Class Central reviews

Start your review of CS50's Introduction to Databases with SQL

  • Profile image for Alok Kumar
    Alok Kumar @alokcentral
    1
    Good Course. The preceptor explains in a simpler way and the most attractive part of cs50's course is its problems sets. By solving psets you will build concepts. Because of huge community support i am giving it a 5 star.
  • YOGESH DHARMA PATIL
    3
    The "CS50's Introduction to Databases with SQL" course by Harvard University via edX is an outstanding resource for anyone interested in databases and SQL. The course covers a broad range of essential topics such as creating and managing databases, writing complex queries, and optimizing performance. The lectures are clear and engaging, with hands-on exercises that solidify the learning process. Whether you're a beginner or have some experience, this course provides valuable insights and practical skills. The instructors are knowledgeable, and the pace is well-suited for self-paced learning. Highly recommended for all learners!
  • Profile image for Dhruv Siddhapura
    Dhruv Siddhapura
    CS50’s Introduction to Databases with SQL” ek zabardast beginner-friendly course hai jo SQL aur database design ke basics ko clearly samjhata hai. Harvard ke CS50 team ne banaya hai, so quality top-tier hai — real datasets, practical exercises, aur strong conceptual clarity milti hai. SQLite se start karke MySQL/PostgreSQL tak jaata hai. Thoda time-consuming hai aur advanced concepts (jaise performance tuning, NoSQL) cover nahi karta, par foundation ke liye perfect hai. Certificate paid hai, lekin free audit version worth it hai. Overall — solid, trusted, aur resume-worthy course for anyone wanting strong SQL fundamentals.
  • Profile image for Sunam Ghosh
    Sunam Ghosh
    I highly recommend this course to anyone interested in mastering SQL and understanding how databases work. The content is extremely well-structured, starting from the basics and gradually moving into more complex concepts like joins, normalization, indexes, transactions, and security. The problem sets are challenging but rewarding, and the explanations provided by Professor Malan and the team are clear and engaging. What makes it even more valuable is that it not only teaches syntax but also focuses on best practices and real-world database design. I feel more confident working with databases after completing this course.
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