NULLS

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 Literals).

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:

Redshift

IN -> Redshift_01.sql

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

Result

Select1
NULL

1+NULL	1*NULL
NULL	NULL

Output Code:

Snowflake

OUT -> Redshift_01.sql

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

Result

Select1
NULL

1+NULL	1*NULL
NULL	NULL

Know Issues

No issues were found.

Related EWIs

There are no known issues.