如何删除其经理在纽约的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
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表部门栏目
empid dept managerid
101 a 102
102 a
103 a 102
104 b 105
105 b
106 b 105
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