query: SELECT max(Age) ,  min(Age) FROM STUDENT WHERE Major  =  600
question: What-all are the maximum and minimum ages of students with major 600?
query_toks: SELECT max ( Age ) , min ( Age ) FROM STUDENT WHERE Major = 600
query_toks_no_value: select max ( age ) , min ( age ) from student where major = value
question_toks: What-all are the maximum and minimum ages of students with major 600?