16.20 - RESPECT NULLS - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Functions, Expressions, and Predicates

Product
Advanced SQL Engine
Teradata Database
Release Number
16.20
Release Date
March 2019
Content Type
Programming Reference
Publication ID
B035-1145-162K
Language
English (United States)

If the preceding or following row determined by offset_value is within the scope of the window group, and if the value_expression evaluation returns a NULL, LAG or LEAD returns NULL. This setting indicates that the NULL value is not ignored.

If the preceding or following row is outside the scope of the window group, LAG or LEAD returns default_value_expression.

If the optional NULL clause is not specified, the default option is RESPECT NULLS.