CREATE TABLE table_2182170_1 (car_s_ VARCHAR2, listed_owner_s_ VARCHAR2)

How many cars does Gregg Mixon own?
SELECT COUNT(car_s_) FROM table_2182170_1 WHERE listed_owner_s_ = "Gregg Mixon"
SELECT COUNT("car_s_") FROM "table_2182170_1" WHERE "Gregg Mixon" = "listed_owner_s_"