Usage Notes | UNNEST | Teradata Vantage - 17.10 - Usage Notes - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Data Types and Literals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1143-171K
Language
English (United States)

UNNEST is a table function; therefore, it can only appear in the FROM clause of an SQL SELECT statement.

If the ARRAY expression argument evaluates to NULL, then no rows will be returned in the result table. If the ARRAY expression argument is not NULL but has one or more elements that are not present, then the column value for the array element in the corresponding result row will be NULL.