Learn SQL Online for Free

Structured Query Language (SQL) is the standard language for dealing with Relational Databases. Whether you want to become a Data Analyst, a Backend Developer, or just organize your data, SQL is an essential skill.

1. The SELECT Statement

The most basic command is SELECT. It retrieves data from a database.

SELECT name, price FROM products;

You can also use * to select all columns.

2. Filtering with WHERE

Use the WHERE clause to filter records.

SELECT * FROM customers WHERE city = 'New York';

3. Ordering Data

Sort your results using ORDER BY.

SELECT * FROM products ORDER BY price DESC;