If you've setup numerous SharePoint 2010 test boxes in order to get comfortable with all the great new features. Because I'm running in a test environment I hadn't been paying too much attention to the SQL server I was using. Yesterday I logged in and found a staggering number of similarly named databases which were no longer being used because the test boxes were done.
So how do you figure out which databases are which? There's a great SharePoint Powershell cmdlet you can run on your SharePoint server that will give you a list of all the databases your server is using:
Get-SPDatabase | Sort-Object disksizerequired -desc | Format-Table Name
When you run the command, you'll get a list of all the databases similar to the following:
Now that you have your list, log into SQL Server Management Studio and delete the corresponding databases:
Get-SPDatabase | Sort-Object disksizerequired -desc | Format-Table Name | out-file c:\databases.txt
You can also see how big the databases are by running the following:
Get-SPDatabase | Sort-Object disksizerequired -desc Format-Table Name, @{Label ="Size in MB"; Expression = {$_.disksizerequired/1024/1024}}