Question: What is the average Year, when Country is "U.S.", and when Location is "Edmond , OK"?
SQL: SELECT AVG("Year") FROM "2-17794738-7" WHERE "Country" = 'U.S.' AND "Location" = 'Edmond , OK';

Question: What is the lowest Killed, when Perpetrator is "Sherrill, Patrick Henry , 44"?
SQL: SELECT MIN("Killed") FROM "2-17794738-7" WHERE "Perpetrator" = 'Sherrill, Patrick Henry , 44';