Filter Pivot Table

Hello. Thank you for the plugin.

Is there a way to filter a pivot table to show only one set of results? I cannot see any documentation in the Google Language Reference link. I have a database with information on schools and the number of students for each school by country. Using the query I can produce a pivot that sums the students by country with the school name as the column header, but I want to filter to show only one particular school per post.

Thanks in advance!