16.20 - Example: Using DEFAULT in a Predicate - Teradata Database

Teradata Vantageā„¢ - SQL Functions, Expressions, and Predicates

prodname
Advanced SQL Engine
Teradata Database
vrm_release
16.20
created_date
March 2019
category
Programming Reference
featnum
B035-1145-162K

The following statement uses DEFAULT to compare the values of the Dept_No column with the default value of the Dept_No column. Because the comparison operation involves a single column reference, Teradata Database can derive the column context of the DEFAULT function even though the column name is omitted.

   SELECT * FROM Employee WHERE Dept_No < DEFAULT;

Note that if the DEFAULT function evaluates to null, the predicate is unknown and the WHERE condition is false.