RESPECT NULLS

Teradata Vantageā„¢ SQL Functions, Expressions, and Predicates

brand
Software
Teradata Vantage
prodname
Teradata Database
Teradata Vantage NewSQL Engine
vrm_release
16.20
category
Programming Reference
featnum
B035-1145-162K

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.