While I can appreciate the creative approaches of updating the database, the idea of programatically running an UPDATE query give me the heebie jeebies.
If all you want is to make sure the emails stop, why not programatically disable the email account that Solarwinds is using to send those emails from instead? That seems much less dramatic, and much less likely to cause an issue to your MONITORING database - especially in light of the fact that it will be very busy processing all those alerts and you would likely run into record lock situations for an update command.