Query-by-Example (QBE)

1. QBE is both a query language and the name of a DB system including it. The system is no longer in use, but the language is part of IBM's Query Management Facility (QMF).

• Basic Structure
• Simple Queries
• Queries on Several Relations
• The Condition Box
• The Result Relation
• Ordering the Display of Tuples
• Aggregate Operations
• Modifying the Database
  • Insertion
  • Updates