- Structured Query Language (SQL or SEQUEL)
- Success of relational databases
- Developed for SystemR at IBM
- ANSI standardised
- SQL1 or SQL-86, ongoing extension
- SQL2 or SQL-92, current version
- SQL3 (1999), SQL2003
- DDL, DML(low-level) and VDL
In Focus
1.1.29. Structured Query