Can multiple instance be in one physical professor?

Can multiple instance be in one physical professor?If it can,how can I run multiple queries in this multiple instance?
Any help would be very appreciated.
Regards

Let me see if I understood your requirement, you want to have several Oracle Instances on the same machine (processor) don't you. And you want to run a single query against this, it could be interpreted in a couple of ways, you may want to set up a RAC environment, and let oracle decide where it is going to run the query, or you could be talking about a distributied query, peforming a join against different tables located on different instances.
Further clarification is required from your side.
~ Madrid

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