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NEW QUESTION: 1
You created a view called EMP_DEPT_VU that contains three columns from the EMPLOYEES and DEPARTMENTS tables:
EMPLOYEE_ID, EMPLOYEE_NAME AND DEPARTMENT_NAME.
The DEPARTMENT_ID column of the EMPLOYEES table is the foreign key to the primary key DEPARTMENT_ID column of the DEPARTMENTS table.
You want to modify the view by adding a fourth column, MANAGER_ID of NUMBER data type from the EMPLOYEES tables.
How can you accomplish this task?
A. ALTER VIEW emp_dept_vu (ADD manager_id NUMBER);
B. MODIFY VIEW emp_dept_vu (ADD manager_id NUMBER);
C. 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;
D. You must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.
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. 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;
Answer: E
Explanation:
When we want to alter the underlying data used in the definition of a view, we use the CREATE OR REPLACE VIEW statement. When a CREATE OR REPLACE VIEW statement is issued, Oracle will disregard the error that arises when it encounters the view that already exists with that name, and it will overwrite the definition for the old view with the definition for the new one.
Incorrect Answers
A: There is no ALTER VIEW command in Oracle.
B: There is no MODIFY VIEW command in Oracle.
C: There is no ALTER VIEW command in Oracle.
D: There is no MODIFY VIEW command in Oracle.
F: You don't need to remove the existing view to create modified view. You are able to do that with CREATE OR REPLACE command.
OCP Introduction to Oracle 9i: SQL Exam Guide, Jason Couchman, p. 310-313 Chapter 7: Creating Other Database Objects in Oracle
NEW QUESTION: 2
During an ongoing, customer-specific product development project, the customer s project manager is changed. The new project manager fails to receive updates about the project's deliverables.
What should the new project manager do?
A. Update the communications management plan.
B. Refer to the stakeholder register.
C. Refer to the scope document.
D. Update the change log.
Answer: A
NEW QUESTION: 3
us-central1-aでCompute Engine仮想マシン（VM）のアプリケーションをホストしています。設計を調整して、単一のCompute Engineゾーンの障害をサポートし、ダウンタイムをなくし、コストを最小限に抑えたいと考えています。あなたは何をするべきか？
A. -HTTP（S）ロードバランサーを作成します。
-トラフィックをVMに転送する1つ以上のグローバル転送ルールを作成します。
B. -マネージドインスタンスグループを作成し、ゾーンとしてus-central1-aを指定します。
-ヘルスインターバルを短くしてヘルスチェックを設定します。
C. -アプリケーションの定期的なバックアップを実行します。
-クラウドモニタリングアラートを作成し、アプリケーションが利用できなくなった場合に通知を受けます。
-通知されたときにバックアップから復元します。
D. -us-central1-bにCompute Engineリソースを作成します。
-us-central1-aとus-central1-bの両方に負荷を分散します。
Answer: B