How to restore existing Site Collection Content DB to a SharePoint Site Collection

Question

I have a Site Collection Content DB back up. I want to create/ restore to existing site collection. Are there any ways to do that?

Answer 1

We can only Attach an existing content database to a web application, while cannot attach an existing content database to a site collection.

To attach an existing content database to a web application:

1.Restore a backup copy of the database in SQL.

2.Use the following PowerShell to attach an existing content database to a web application:

Mount-SPContentDatabase "<ContentDb>" -DatabaseServer "<DbServer>" -WebApplication http://SiteName

Refer to the article about Attach or detach content databases in SharePoint 2013:

https://technet.microsoft.com/en-us/library/ff628582.aspx

Answer 2

You did not specify which version of SharePoint you have. But if it is at least 2010, unattached content database can be used.

See https://technet.microsoft.com/cs-cz/library/hh269601(v=office.14).aspx

1. Restore the database to SQL server
2. Use PowerShell or UI to restore the site collection you need