Bivalent and Higher-Valued Logics | Database Design | VantageCloud Lake - Bivalent and Higher-Valued Logics - Teradata Vantage

This topic presents a brief overview of the relevant predicate logic underlying the database relational model and the place of nulls in that logic.

A two-valued logic (2VL) has 2 truth values: TRUE and FALSE. while a multivalued logic (MVL) has the truth values TRUE and FALSE plus an additional number, where the number of truth values depends on the individual logic.

• First Order Predicate Logic and Bivalent Logic
• The Closed World Assumption Revisited
• Number of Logical Operators Supported for Bivalent and Trivalent Logics
• SQL Support for a Consistent Trivalent Logic