A Gentle Introduction to SQL
An interactive tutorial. Allows access to tables using any of Oracle, SQL Server, MySQL, Access or PostgreSQL engines.
An Introduction to Database Normalization
Article by Mike Hillyer. Normalizing data is the most effective way to decrease storage requirements and increase data integrity. In this tutorial we cover the basics of data norm…
An Introduction to Structured Query Language (SQL)
By Pan Pantziarka. From creating a simple database to select queries, joins, updates, inserts.
Database and SQL eLearning
Database theory and an online tutorial interface to an Oracle database system, allowing a user to learn SQL interactively. The site automatically checks and marks SQL and gives ins…
Intro To Structured Query Language (SQL)
A basic introduction to writing queries so that beginners can begin to extract data from an existing relational database.
Kihlman's SQL (Graphic SQL tutorial)
This program helps you learn SQL, Structured Query Language. You can use the test questions or make your own SQL statements. [Shareware]
SQL Cheat Sheet: Query By Example
Provides ANSI-SQL solutions to common database query/update tasks. These apply to such relational databases as PostGreSQL, MySQL, Microsoft SQL Server, Oracle, Microsoft Access, SQ…
SQL exercises
Help everyone to gain or improve skills in building SQL Data Manipulation Language statements. A rating system is supported for SELECT exercises and certification. SQL handbook. En…
SQL for Web Nerds
A nicely structured manuscript on SQL by Philip Greenspun, based on the Oracle database. Queries, transactions, triggers, and RDBMS concepts are covered.
SQL School
Full set of SQL language tutorials featuring in depth coverage on each SQL command.
Summarizing data with SQL (Structured Query Language)
This article provides a brief SQL How-to on how to summarize data. Most of the examples we provide will be based on the ANSI-SQL 92 standard. Some examples will show features spe…
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