<ul data-eligibleForWebStory="false">To stop a running BigQuery job before completion, use the 'bq cancel' command followed by the job ID.For example, 'bq cancel job_id' will immediately halt the job's execution.You can find the job ID from various sources like GCP console, logging systems, or bq query outputs.Using 'bq ls -j' allows listing recent jobs with their details, including job ID.The 'bq cancel' command helps save costs by stopping long-running or unoptimized queries.It also allows for quickly interrupting accidental or test jobs.