What is SQL?
Learn what SQL stands for, its history, and how it lets you communicate with a relational database — think of it as the language databases understand.
What is SQL? is a free SQL Academy lesson on CoddyKit — lesson 2 of 3. You can read the complete lesson below for free — then practise it hands-on in the browser with a built-in code editor and a 24/7 AI tutor. It is part of the SQL Academy learning path, one of 3 lessons in the course, and your progress syncs across the web and the CoddyKit app.
Meet SQL
SQL is the language we use to talk to a database. It's how you ask it questions and get answers. 🗣️
Say it out loud
SQL stands for Structured Query Language. Most people just say 'sequel'. Easy, right?
It reads like English
Good news: SQL is designed to feel close to plain English. You'll recognize a lot of it instantly.
Ask a question
Think of SQL as asking the librarian: 'Show me all the books by this author.' The database goes and finds them. 📚
The magic word: SELECT
The most common SQL command is SELECT. It simply means 'show me' the data you want.
A tiny example
Here's a real query. It asks for the name and email of everyone in a users table. See how readable it is?
SELECT name, email FROM users;FROM means where
FROM tells SQL which table to look in. So 'FROM users' means look inside the users table.
More than reading
SQL can also add new data, update it, or delete it. But reading with SELECT is where you'll start.
Used everywhere
SQL powers apps, websites, banks, and games. Learning it is a genuinely useful skill. 🌍
Look how far you came
You now know what SQL is and met SELECT. Next, let's read a real query piece by piece. 🚀
Quick Check
Let's check! Which SQL command means 'show me' the data you want?
Frequently asked questions
Is the “What is SQL?” lesson free?
Yes — the full text of “What is SQL?” is free to read here on the web, and the SQL Academy course includes 3 lessons in total. To practise it interactively (a built-in code editor and a 24/7 AI tutor) and unlock the rest of the SQL Academy course, upgrade to CoddyKit PRO.
What will I learn in “What is SQL?”?
Learn what SQL stands for, its history, and how it lets you communicate with a relational database — think of it as the language databases understand. You practise SQL Academy with hands-on code you run directly in the browser, and a 24/7 AI tutor answers your questions as you work through the lesson.
Do I need any experience to start SQL Academy?
No prior experience is required. SQL Academy on CoddyKit is structured for beginners through advanced learners; this is — lesson 2 of 3, so you can start here or from the beginning and move at your own pace.
How long does the “What is SQL?” lesson take?
Most CoddyKit lessons take about 5–10 minutes. Each one is bite-sized and interactive, so you make steady progress and pick up exactly where you left off across the web and the app.
Can I write and run code in this SQL Academy lesson?
Yes. Every SQL Academy lesson includes a built-in code editor, so you write and run real code right in your browser and get instant AI feedback — no local setup required.
All lessons in this course
- What is a Database?
- What is SQL?
- Your First Look at a Query