SQL iceberg - AlexandreHTRB blog
The SQL language, Structured Query Language, first emerged in 1974 and is one of the leading languages to this day, when it comes to databases.
SQL evolved a lot throughout the years and especially over the last two decades, with modern data organization techniques, that came up as a response to new competitors (NoSQL) and new needs (analytics, data warehouse, cloud computing).
This article is a SQL cheatsheet, covering some of the most common commands to those that are rare and have interesting uses. This list tries to be easy to understand for beginners and for those who already have some familiarity with the language.
The examples here are for Microsoft SQL Server, but most of them apply in a similar or equal way for other databases, such as PostgreSQL, MySQL and Oracle.
To test the examples of this article, I recommend installing SQL Server (download) and SQL Server Management Studio (SSMS) (download).
