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SQL SELECT
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SQL UPDATE
SQL JOIN
SQL GROUP BY
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SQL (Structured Query Language) is a powerful and standard query language for relational database systems. We use SQL to perform CRUD (Create, Read, Update, Delete) operations on databases along with other various operations.

SQL has evolved a lot in the past decade. Our SQL tutorials will help you understand the core concepts of modern SQL in database systems such as MySQL, PostgreSQL, Oracle and MS SQL, one step at a time.

Do you want to learn SQL the right way? Enroll in our Interactive SQL Course for FREE.

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Introduction

What is SQL?

SQL is a standardized programming language that is used to communicate with database systems.

SQL is used to

  • create databases
  • create tables in a database
  • read data from a table
  • insert data in a table
  • update data in a table
  • delete data from a table
  • delete database tables
  • delete databases
  • grant and revoke permissions
  • backup and restore databases
  • and many more database operations

Why Learn SQL?

  1. SQL is used to communicate with popular relational database systems. It is used in data systems such as MySQL, PostgreSQL, Oracle and many others.
  2. Knowledge of SQL is preferred in demanding jobs like software engineer, business analyst, data scientist, etc.

How to learn SQL?

  1. Interactive SQL Course - Want to learn SQL by solving quizzes and challenges after learning each concept? Enroll in our SQL Interactive Course for FREE.
  2. SQL Tutorial from Programiz - We provide step-by-step tutorials along with clauses, statements, functions and examples. Get started with SQL.
  3. Practice a lot - The only way you can learn SQL is by practicing. By the way, you can use our Online SQL Compiler to practice SQL without installing anything on your computer.