Hi Christie,
In order to create a cluster bar you'll need two or more instances of bar series. This means that you cannot directly use the automatic data import from a single sql table / view as there must be some logic that groups the bars into clusters. Can you post the table schema as well as some sample data on what you actually want to chart? - this will be helpful to provide a code snippet showing how to achieve this.
Best Regards,Nevron Support Team