What is SQL? | SQL & Databases Explained Simply

Published: 25 August 2026
on channel: Quick Code

In this video, we’ll learn the basics of SQL (Structured Query Language) and understand how it is used to communicate with databases.

We’ll cover:

🔹 What is SQL?
🔹 A brief history of SQL
🔹 What is a relational database?
🔹 Tables, rows and columns
🔹 Primary Keys and Foreign Keys
🔹 How tables are connected
🔹 Basic SQL operations – SELECT, INSERT, UPDATE and DELETE
🔹 Using WHERE to filter data
🔹 Understanding JOINs
🔹 Why SQL is still important today
🔹 Popular SQL database systems such as MySQL, PostgreSQL, SQL Server and Oracle

This video is designed for beginners who are starting to learn SQL, databases and software development.

If you're new to SQL, this video will give you a simple foundation before moving on to more advanced database concepts.

👍 If you found this video helpful, don't forget to Like, Subscribe and share!

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