Glossary
1:1 Shorthand for a one-to-one relationship.
1:M Shorthand for a one-to-many relationship.
A
Abstract class A class from which no objects are created.
Abstract data type In an object-oriented environment, a user-defined data type; a class.
Accessor method A function that returns the values of private data stored about an object.
Aggregate function A SQL function—for example, AVG and SUM—that computes a variety of measures based on values in one or more numeric columns.
Aggregation In an object-oriented environment, a class that manages objects created from another class.
All-key relation A relation in which every column is part of the primary key.
American National Standards Institute (ANSI) The US body that approves standards for many ...
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