Which command can be used to specify the degree of parallelism for a table?

The command to specify the degree of parallelism for a table in Oracle is designed to modify how the database processes queries for that table, allowing for simultaneous execution using multiple threads. This can significantly improve performance for large data processing tasks.

In this case, the statement "ALTER TABLE sales PARALLEL 8" accurately uses the syntax defined in Oracle for altering the parallel attributes of a table. The 'ALTER TABLE' command is essential to change an existing table's configuration, and appending 'PARALLEL 8' specifies that the degree of parallelism for the 'sales' table should be set to 8, meaning up to eight parallel executions can be used for operations involving this table.

Meanwhile, the other options do not conform with the standard Oracle syntax for achieving this function, which is why they would not execute successfully in the environment. For example, the inclusion of 'SET' in another option suggests a structure that does not exist in the Oracle commands, while others utilize malformed phrases or incorrect sequences. Understanding the right command structure is crucial for effectively managing performance through parallel execution in Oracle Autonomous Database.