如何删除经理在纽约的emp?
员工表
empid name salary location
101 john 10000 newyork
102 pavan 25000 newyork
103 laxman 10000 ahmedabad
104 ram 15000 usa
105 arjun 30000 washington
106 gopal 12000 washington
表部门列
empid dept managerid
101 a 102
102 a
103 a 102
104 b 105
105 b
106 b 105