
SQL - Wikipedia
Structured Query Language (SQL) (pronounced / ˌɛsˌkjuˈɛl / S-Q-L; or alternatively as / ˈsiːkwəl / ⓘ "sequel") [4][5] is a domain-specific language used to manage data, especially in a relational …
SQL Tutorial - W3Schools
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 »
20 Basic SQL Query Examples for Beginners - LearnSQL.com
Aug 17, 2023 · An overview of the 20 basic SQL query examples that every SQL beginner should master before going to the more advanced SQL concepts.
SQL Cheat Sheet ( Basic to Advanced) - GeeksforGeeks
Jul 23, 2025 · In this guide, we will see a comprehensive cheat sheet for essential SQL operations, offering a practical reference for tasks ranging from database creation to advanced data handling …
SQL Tutorial: Learn SQL from Scratch for Beginners
This SQL Tutorial helps you master SQL quickly and effectively through many hands-on and practical examples with quizzes.
SQL Query Concepts with Examples - TechBeamers
Nov 30, 2025 · Learn to write SQL queries in 15 steps, covering basic syntax, key SQL commands, and advanced topics like joins, subqueries, and indexing—all with real-world examples.
SQL Queries You Need to Know (with Practical Examples) - Dataquest
Feb 24, 2025 · Learn how to write SQL queries to extract data from two or more databases, use SQL dot commands to simplify tasks, and more!
27 SQL Query Examples to Practice Data Analysis - Great Learning
Oct 17, 2025 · Explore 30+ query examples for data retrieval, joins, aggregation, updates, and more.
SQL Tutorial - GeeksforGeeks
Nov 5, 2025 · Learn the foundational concepts of SQL, essential for anyone working with relational databases. This section covers the syntax, commands, and key elements to start querying and …
Learn SQL Online Free - Interactive SQL Tutorial for Beginners
This tutorial provides you with easy to understand SQL instructions and allows you to practice while you are learning, using an online SQL interpreter. By practicing your SQL commands and seeing …