Maybe the query optimizer doesn't see any performance improvements from running the query in parallael? You can use the "Alternate Show Plans" tool to see what other query plans were considered.

Hi Fei,

No, Optimizing Your SQL Queries is a 41-minute video that covers important concepts relevant to both designing and using InterSystems IRIS SQL. Its inclusion in both sections is intentional.

Hey Enrico, thanks for catching this. The SQL Best Practices Doc link is redundant and will be removed from the post.