CREATE TABLE table_19787093_1 (till_aligarh NUMBER, vehicle_category VARCHAR2)

If the vehicle category is multi-axle vehicle, what is the till aligarh?
SELECT MIN(till_aligarh) FROM table_19787093_1 WHERE vehicle_category = "Multi-axle Vehicle"
SELECT MIN("till_aligarh") FROM "table_19787093_1" WHERE "Multi-axle Vehicle" = "vehicle_category"