NULLS

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Description

If a column in a row is missing, unknown, or not applicable, it is a null value or is said to contain null. (Redshift SQL Language reference Nulls Literalsarrow-up-right).

Nulls can appear in fields of any data type that are not restricted by primary key or NOT NULL constraints. A null is not equivalent to the value zero or to an empty string.

Sample Source Patterns

Input Code:

IN -> Redshift_01.sql
SELECT NULL IN (NULL, 0, 1, 2 ,3, 4);
SELECT 1 + NULL, 1 - NULL, 1 * NULL, 1 / NULL, 1 % NULL;

Output Code:

OUT -> Redshift_01.sql
SELECT NULL IN (NULL, 0, 1, 2 ,3, 4);
SELECT 1 + NULL, 1 - NULL, 1 * NULL, 1 / NULL, 1 % NULL;

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