Materialized views require Enterprise Edition. To inquire about upgrading, please contact Snowflake Support
https://docs.snowflake.com/en/sql-reference/sql/create-materialized-view.html#:~:text=Materialized%20views%20require%20Enterprise%20Edition,upgrading%2C%20please%20contact%20Snowflake%20Support.

Clustering keys in Snowflake are used to reorganize large tables based on one or more columns. This feature optimizes the arrangement of data within micro-partitions to improve query performance, especially for large tables where efficient data retrieval is crucial. Reference: [COF-C02] SnowPro Core Certification Exam Study Guide
https://docs.snowflake.com/en/user-guide/tables-clustering-keys.html

In Snowflake, to extract a specific value from a VARIANT column, you use the column name followed by a colon and then the key. The keys are case-sensitive. Therefore, to extract the employee's name from the
"Data" column, the correct syntax is data:employee.name.

Stored procedures in Snowflake can be created with either 'owner's rights' or 'caller's rights'. A stored procedure created with caller's rights executes with the privileges of the role that calls the procedure, not the privileges of the role that owns the procedure. This is particularly useful in scenarios where the procedure needs to perform operations that depend on the caller's access permissions, ensuring that the procedure can only access objects that the caller is authorized to access.
Reference: Snowflake's official documentation on stored procedures, specifically the section on execution context (caller's rights vs. owner's rights), provides detailed guidance on when to use caller's rights:
https://docs.snowflake.com/en/sql-reference/stored-procedures-usage.html#caller-s-rights-vs-owner-s-rights