1Z0-007
单选题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 DEPARTMEN
题目
ALTER VIEW EMP_dept_vu (ADD manger_id NUMBER);
MODIFY VIEW EMP_dept_vu (ADD manger_id NUMBER);
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;
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;
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;
You must remove the existing view first, and then run the CREATE VIEW command with a new column list to modify a view.
相似问题和答案
第1题：
A. DROP emp_dept_uv;
B. DELETE emp_dept_uv;
C. REMOVE emp_dept_uv;
D. DROP VIEW emp_dept_uv;
E. DELETE VIEW emp_dept_uv;
F. REMOVE VIEW emp_dept_uv;
第2题：
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 keyDEPARTMENT_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 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.
第3题：
A、yet
B、already
C、never
第4题：
The database administrator of your company created a public synonym called HR for the HUMAN_RESOURCES table of the GENERAL schema, because many users frequently use this table. As a user of the database, you created a table called HR in your schema. What happens when you execute this query? SELECT * FROM HR; （）
- A、You obtain the results retrieved from the public synonym HR created by the database administrator.
- B、You obtain the results retrieved from the HR table that belongs to your schema.
- C、You get an error message because you cannot retrieve from a table that has the same name as a public synonym.
- D、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a Cartesian product.
- E、You obtain the results retrieved from both the public synonym HR and the HR table that belongs to your schema, as a FULL JOIN.
正确答案:B
第5题：
Which SQL statement would you use to remove a view called EMP_DEPT_VU from your schema?（）
- A、DROP emp_dept_uv;
- B、DELETE emp_dept_uv;
- C、REMOVE emp_dept_uv;
- D、DROP VIEW emp_dept_uv;
- E、DELETE VIEW emp_dept_uv;
- F、REMOVE VIEW emp_dept_uv;
正确答案:D
第6题：
A. Create a table view.
B. Create a view in any schema.
C. Create a view in your schema.
D. Create a sequence view in any schema.
E. Create a view that is accessible by everyone.
F. Create a view only of it is based on tables that you created.
第7题：
You are granted the CREATE VIEW privilege. What does this allow you to do?（）
- A、Create a table view.
- B、Create a view in any schema.
- C、Create a view in your schema.
- D、Create a sequence view in any schema.
- E、Create a view that is accessible by everyone.
- F、Create a view only of it is based on tables that you created.
正确答案:C
第8题：
You have recently created an application, and want to capture all debugging text messages generated by it.You would like these debugging messages to display on the command line. The application that you created contains the following code:Debug.WriteLine ("Start the processing");Console.WriteLine ("Generated by Console.WriteLine");Debug.WriteLine ("End the processing");You need to ensure that you are able to capture all debugging messages to the command line.What should you do?（）
A.
B.
C.
D.
第9题：
Which two statements about views are true? （）
- A、A view can be created as read only.
- B、A view can be created as a join on two or more tables.
- C、A view cannot have an ORDER BY clause in the SELECT statement.
- D、A view cannot be created with a GROUP BY clause in the SELECT statement.
- E、A view must have aliases defined for the column names in the SELECT statement.
正确答案:A,B
第10题：
You need to perform certain data manipulation operations through a view called EMP_DEPT_VU, which you previously created. You want to look at the definition of the view (the SELECT statement on which the view was create.) How do you obtain the definition of the view? （）
- A、Use the DESCRIBE command in the EMP_DEPT VU view.
- B、Use the DEFINE VIEW command on the EMP_DEPT VU view.
- C、Use the DESCRIBE VIEW command on the EMP_DEPT VU view.
- D、Query the USER_VIEWS data dictionary view to search for the EMP_DEPT_VU view.
- E、Query the USER_SOURCE data dictionary view to search for the EMP_DEPT_VU view.
- F、Query the USER_OBJECTS data dictionary view to search for the EMP_DEPT_VU view.
正确答案:D