Moving a SharePoint site collection as a sub-site of another site collection

Moving a site collection to be a sub-site of another site collection can be achieved by exporting the site collection data and importing it as a sub-site.

Below are the steps:

• Open up a SharePoint 2010 Management Shell
• Execute the following PowerShell command to export the site collection

export-spweb “site collection url” -path “export filename” -includeusersecurity –includeversions All

• Create a sub-site at the destination location with a blank site template
• Execute the following PowerShell command to import the site collection to the sub-site

Import-spweb “sub-site url” -path “export file name”