1.1.29. Structured Query

  • 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