To create a composite primary key on multiple columns, you would use the PRIMARY KEY constraint followed by the column names in parentheses, like this: PRIMARY KEY (column1, column2).

The SHOW STATUS; command provides a detailed overview of the current MySQL server status, including information about connections, queries, uptime, and other performance metrics.

A quorum in MySQL InnoDB Cluster refers to the majority of nodes that must agree on committing a transaction to ensure consistency and avoid split-brain scenarios. It is crucial for maintaining data integrity in the cluster.

MySQL Enterprise Firewall provides real-time monitoring and protection by analyzing and blocking suspicious queries, such as SQL injection attempts, based on predefined rules and learned behaviors.

HeatWave improves the performance of analytical queries by parallelizing query execution across multiple HeatWave nodes. This allows complex queries to be processed faster by dividing the workload across several in-memory nodes.