What is CQLSH used for in Cassandra?

CQLSH, or Cassandra Query Language Shell, is a command-line interface tool used to interact with a Cassandra database through the Cassandra Query Language (CQL). It allows users to execute queries, manage tables, insert and retrieve data, and perform other database operations directly from the command line.

CQL is specifically designed for Cassandra, and CQLSH serves as the interface that simplifies the process of writing and executing these queries. Users can use CQLSH to define the structure of data, query data, and manipulate tables in a straightforward way, making it essential for anyone working with Cassandra databases.

While the other options pertain to valid functionalities within Cassandra or related tools, they do not accurately describe the primary function of CQLSH. For example, data visualization and user privilege management are tasks that require different tools or techniques, while monitoring cluster health typically involves separate monitoring tools or dashboards specifically designed for that purpose.