发布日期:2020-04-10
A.ALTER VIEW EMP_dept_vu (ADD manger_id NUMBER);
B.MODIFY VIEW EMP_dept_vu (ADD manger_id NUMBER);
C.ALTER VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employee e, departments d WHERE e.department _ id = d.department_id;
D.MODIFY VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;
E.CREATE OR REPLACE VIEW emp_dept_vu AS SELECT employee_id, employee_name, department_name, manager_id FROM employees e, departments d WHERE e.department _ id = d.department_id;
F.You must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.
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