SQL

SQL (Structured Query Language) is a computer language used to query or manage a database. The first commercial version appeared in 1979.

It is derived from relational algebra and from SEQUEL (Structured English QUEry Language).

Example of an SQL request - SELECT name FROM products WHERE price > 150 ORDER BY price; - gives the names of products with a price greater than 150, in ascending order of price.

Some databases that use SQL: MySQL, Oracle, Microsoft SQL Server, PostgreSQL. etc.