Answer: True

The correct answer is True because Snowflake documentation explicitly states that a single clustering key can contain one or more columns or expressions. Multiple community comments with upvotes reference the official Snowflake documentation confirming this capability, with one comment providing a concrete example: 'create or replace table t1 (c1 date, c2 string, c3 number) cluster by (c1, c2);' which demonstrates defining multiple columns (c1 and c2) within a clustering key. The community consensus strongly supports this with 86% selecting True, and the dissenting comment about deprecated functions appears to be incorrect or referring to a different topic.

Author: LeetQuiz Editorial Team