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You can achieve this using the Import Data wizard from SQL Management Studio. What you have to do is to import all data from your Sitefinity database to the other one and then change the connection string in the DataConfig file. You can find some steps on how to use this tool here
the Telerik team
Do you want to have your say in the Sitefinity development roadmap? Do you want to know when a feature you requested is added or when a bug fixed? Explore the Telerik Public Issue Tracking
system and vote to affect the priority of the items