Clear Unreviewed DA search results

I have a manager that can perform DA searches and I have one search in particular that they did that returned over 400K emails.  The emails are past the our retention period and aren't on litigation hold.  They appear to have been been deleted per the site retention settings because the preview panel doesn't show the email.  However, DA still has this large block of emails still showing as unreviewed.  I can delete the unreviewed items manually 1,000 at a time but this will take months.  Is their a way I can do this quickly through an SQL query?  I've attached a picture of what I'm talking about.  Note that in the photo I tried doing 10,000 at a time but DA only does deletes 1,000.