query: SELECT StuID FROM Has_allergy GROUP BY StuID HAVING count(*)  >=  2
question: Are Showing all student ID who have at least two allergy.
query_toks: SELECT StuID FROM Has_allergy GROUP BY StuID HAVING count ( * ) > = 2
query_toks_no_value: select stuid from has_allergy group by stuid having count ( * ) > = value
question_toks: Are Showing all student ID who have at least two allergy.