Clustering keys in Snowflake work by sorting the designated columns over time. This process is done in the background and does not block data manipulation language (DML) operations, allowing for normal database operations to continue without interruption. The purpose of clustering keys is to organize the data within micro-partitions to optimize query performance1.
References:
[COF-C02] SnowPro Core Certification Exam Study Guide
Snowflake Documentation on Clustering1
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