Brian,
I understand you are looking for computers where kb2964358 is installed regardless of operating system. According to http://support.microsoft.com/kb/2964358 it is MS14-021 bulletin.
I assume you have had Patch Management set up. In such case I would usethe out-of-box report 'Windows Compliance by bulletin'.
Select MS14-021 bulletin in the report and from the context menu select 'View installed computers'. Then you can save the list to Excel. This still works even if you did not deploy the bulletin to the computers yet.
If you really want to see the sql behind the 'Installed report' 'you can use 'View XML' for the drilled down report. But I would not bother doing it manually if you can have it with 2 clicks.
Let us know how it worked for you.
Tomasz