SQL Tutorial


Our SQL Tutorial is a free educational website which will teach you how to program and use SQL. Our sql tutorial explains the most important SQL clauses, keywords and functions, as well as general SQL and relational database management systems concepts.

Our SQL Tutorial starts with introduction to SQL language and Relational Database Management Systems, and then moves on to simple and frequently used SQL clauses like SELECT, WHERE, UPDATE, and DELETE. After you have familiarized yourself with these basic SQL concepts and SQL clauses, the tutorial explains more complicated SQL concepts including table relationships, primary and foreign keys and database normalization, joining tables, views, and indexes.

Although there are existing SQL standards, most popular relational database management systems like MS SQL Server, Oracle, and DB2 use their own SQL dialect (also know as SQL extension or SQL implementation) of one of the SQL standards (ISO or ANSI). We have strived to remain dialect independent and most of the examples in this tutorial can be applied to most major SQL implementations.

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SQL Tutorial

SQL Tutorial
SQL Introduction
RDBMS and Tables
SQL SELECT
SQL WHERE
SQL INSERT
SQL DISTINCT
SQL UPDATE
SQL DELETE
SQL ORDER BY
SQL Aggregate Functions
SQL GROUP BY
SQL HAVING
Relations, Keys, and Normalization
SQL JOIN
SQL UNION
SQL Nested Queries
CREATE DATABASE, CREATE TABLE and ALTER TABLE
SQL Views
SQL Indexes
SQL Training
SQL Hosting
SQL Replication
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Legal
SQL Resources
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