Answer: False

The correct answer is False because Snowflake does NOT enforce unique, primary key, and foreign key constraints during DML operations. According to Snowflake documentation and the community consensus (with 100% agreement and upvoted comments), Snowflake only enforces NOT NULL constraints. While you can define unique, primary key, and foreign key constraints for documentation and semantic purposes, Snowflake does not validate or enforce them during data manipulation operations like INSERT, UPDATE, or DELETE. This is a key architectural decision in Snowflake that differs from traditional relational databases.

Author: LeetQuiz Editorial Team