Our SQL tutorial will teach you how to use SQL in: MySQL, SQL Server, MS Access, Oracle, Sybase, Informix, Postgres, and other database systems. Start learning SQL now » Examples in Each Chapter

What is SQL? SQL stands for Structured Query Language; SQL lets you access and manipulate databases; SQL became a standard of the American National Standards Institute (ANSI) in 1986, and of the International Organization for Standardization (ISO) in 1987

Learn by examples! This tutorial supplements all explanations with clarifying examples. See All SQL Examples

Introduction: SQL is a standard language for storing, manipulating and retrieving data in databases. W3Schools offers an SQL training course that covers SQL foundations and more. The course includes the W3Schools Certified SQL Developer certification.

The W3Schools SQL Tutorial is comprehensive and beginner-friendly. It will give you a fundamental knowledge of SQL. It is designed for beginners and requires no prior experience with programming.

SQL Statements. Most of the actions you need to perform on a database are done with SQL statements. SQL statements consist of keywords that are easy to understand. The following SQL statement returns all records from a table named "Customers":

In this tutorial you get a step by step guide on how to install and create a PostgreSQL database. You will learn how to create a project where you can create, read, update, and delete data. You will learn how to query, filter, and sort data from the database.

Understand basic SQL syntax and how to write queries. Learn database operations like SELECT, INSERT, UPDATE, and DELETE. Work with database and table structures using CREATE, DROP, and ALTER. Understand advanced SQL operations like JOINs, UNION, and GROUP BY. Handle NULL values and learn about constraints.

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SQL is used to insert, search, update, and delete database records. How to Use SQL The following SQL statement selects all the records in the "Customers" table: