Show all student IDs who have at least two allergies.
CREATE TABLE Has_allergy (StuID VARCHAR)
SELECT StuID FROM Has_allergy GROUP BY StuID HAVING COUNT(*) >= 2
### Context: CREATE TABLE Has_allergy (StuID VARCHAR) ### Question: Show all student IDs who have at least two allergies. ### Answer: SELECT StuID FROM Has_allergy GROUP BY StuID HAVING COUNT(*) >= 2