2.1.05. SQL

Structured Query Language

(SQL or SEQUEL)
Wikipedia reference

Success of relational databases
Developed for SystemR at IBM
ANSI standardised
SQL-1986 (SQL1), ongoing extension
SQL-1992 (SQL2), current version (Oracle 9i)
SQL-1999 (SQL3), regular expression matching, recursive queries
SQL-2003, XML features, auto-generated columns