Step 7: Clean up your resources
Your cluster continues to accrue charges as long as it is running. When you have completed this tutorial, you should return your environment to the previous state by following the steps in Step 5: Revoke access and delete your sample cluster in the Amazon Redshift Getting Started Guide.
If you want to keep the cluster, but recover the storage used by the SSB tables, run the following commands.
drop table part; drop table supplier; drop table customer; drop table dwdate; drop table lineorder;