Operators

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IS operators

IS operators return TRUE or FALSE for the condition they are testing. They never return NULL, even for NULL inputs. (BigQuery SQL Language Reference IS operators)

BigQuery	Snowflake
X IS TRUE	NVL(X, FALSE)
X IS NOT TRUE	NVL(NOT X, TRUE)
X IS FALSE	NVL(NOT X, FALSE)
X IS NOT FALSE	NVL(X, TRUE)
X IS NULL	X IS NULL
X IS NOT NULL	X IS NOT NULL
X IS UNKNOWN	X IS NULL
X IS NOT UNKNOWN	X IS NOT NULL