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What is the primary function of sequences in Snowflake?

  1. To aggregate data from different tables

  2. To generate unique numbers across sessions and statements

  3. To create complex relationships between datasets

  4. To format data for export

The correct answer is: To generate unique numbers across sessions and statements

The primary function of sequences in Snowflake is to generate unique numbers across sessions and statements. Sequences are database objects that are used to create unique numeric values, which can be particularly useful when generating primary keys for tables. This ensures that each key is unique, even if multiple sessions are attempting to insert data into a table concurrently. Sequences provide a scalable way to maintain uniqueness, as they can increment a number automatically, allowing for efficient data handling and integrity. In the context of the other options, while aggregating data, creating relationships between datasets, and formatting data for export are key functionalities in data operations, they do not fall within the specific purpose of sequences. Sequences are strictly focused on number generation and do not handle data aggregation or structural relationships in the database.