Clean up or delete items from the Recoverable Items folder

Hi All,

I'm currently using this commands to clean up recoverable deleted items before migrating, but I'm executing it PER USER. Please see commands below :

First:

Get-MailboxFolderStatistics "alias" -FolderScope RecoverableItems | ft Name,FolderAndSubfolderSize

Second :

Search-Mailbox –identity "alias" –SearchDumpsterOnly –DeleteContent 

Is there a way that I can run a command per Mailbox Database? I mean, it will delete all Recoverable Deleted Items on every users mailbox inside that Mailbox Database?

Thank you!

Ken