Database: pets_1
Question: Find the major of students who do not have a cat pet.
SQL: select major from student where stuid not in (select t1.stuid from student as t1 join has_pet as t2 on t1.stuid  =  t2.stuid join pets as t3 on t3.petid  =  t2.petid where t3.pettype  =  "cat")