Question: Which Conference Joined has a Previous Conference of Northwestern, and a Mascot of Oilers?
SQL: SELECT "Conference Joined" FROM "2-15299125-1" WHERE "Previous Conference" = 'Northwestern' AND "Mascot" = 'Oilers';

Question: Which Year Left is the highest one that has a Location of East Chicago, and a Year Joined of 1969, and a School of East Chicago Roosevelt?
SQL: SELECT MAX("Year Left") FROM "2-15299125-1" WHERE "Location" = 'East Chicago' AND "Year Joined" = 1969.0 AND "School" = 'East Chicago Roosevelt';

Question: Which Year Left is the lowest one that has a School of calumet, and a Year Joined larger than 1993?
SQL: SELECT MIN("Year Left") FROM "2-15299125-1" WHERE "School" = 'calumet' AND "Year Joined" > 1993.0;