Snowflake SnowPro Certification Practice Test

Which constraints are not enforced by Snowflake?

1. NOT NULL and Referential Integrity

2. Primary Keys and Referential Integrity

3. Uniqueness and Primary Keys

4. Referential Integrity and Uniqueness

The correct answer is: Referential Integrity and Uniqueness

Snowflake does not enforce certain constraints at the database level, and among the options provided, the correct selection highlights two specific types of constraints: Referential Integrity and Uniqueness. Referential Integrity is a concept that ensures that relationships between tables remain consistent, meaning that foreign keys should always point to existing primary keys in referenced tables. However, Snowflake does not enforce this condition, allowing for greater flexibility and performance in data loading and storage, but possibly sacrificing data integrity that this constraint would ensure. Uniqueness is another constraint that, while defined within the schema (allowing you to specify that a column or set of columns must have unique values), is not strictly enforced by Snowflake during data operations. This means that duplicate values can exist in a column defined as unique unless explicitly controlled by the user through application logic or SQL queries after data loading. Understanding these constraints' non-enforcement in Snowflake is crucial for proper database design and management, as it impacts how data quality and relationships are maintained.