How can I mass assign shifts from the database?

How can I mass assign shifts from the database?

1. Go to the Database
2. Select one or more volunteer records
3. Click on the black down arrow next to the right of "# records selected"
4. Click on Assign shifts
By assigning a volunteer to a shift that is associated with an opportunity they are not yet assigned to, it will automatically assign the volunteer to the opportunity in order to be able to assign the shift.