大众意识到新闻传媒中可能有偏见并且怀疑新闻传媒强有力的传播效果。然而，大众对被报道的每一条新

A. To find the tax percentage for each of the employees.

B. To list the name, job id, and manager name for all the employees.

C. To find the name, salary, and department name of employees who are not working with Smith.

D. To find the number of employees working for the Administrative department and earning less then 4000.

E. To display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned.

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B．

C．

D．

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B．

C．

D．

A．

B．

C．

D．

maryEMPLOYEE_ID NUMBERKeyVARCHAR2EMP_NAME(30)VARCHAR2JOB_ID(20)SALARY NUMBERReferencesMGR_ID NUMBEREMPLOYEE_IDcolumnDEPARTMENT_ID NUMBER Foreign key toDEPARTMENT_IDcolumn ofthe DEPARTMENTStableDEPARTMENTSNOT NULL,DEPARTMENT_ID NUMBERPrimary KeyVARCHAR2DEPARTMENT_NAME|30|ReferencesMGR_ID columnMGR_ID NUMBERof theEMPLOYEES tableTAXMIN_SALARY NUMBERMAX_SALARY NUMBERTAX_PERCENT NUMBERFor which situation would you use a nonequijoin query？（）

A. To find the tax percentage for each of the employees.

B. To list the name, job id, and manager name for all the employees.

C. To find the name, salary, and department name of employees who are not working with Smith.

D. To find the number of employees working for the Administrative department and earning less then 4000.

E. To display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned.

EPARTMENT_ID NUMBERMANAGER_ID NUMBERLAST_NAME VARCHAR2(25)DEPARTMENTSDEPARTMENT_ID NUMBERMANAGER_ID NUMBERDEPARTMENT_NAME VARCHAR2(35)LOCATION_ID NUMBERYou want to create a report displaying employee last names, department names, and locations. Which query should you use to create an equi-join？（）

A. SELECT last_name, department_name, location_id FROM employees , department ;

B. SELECT employees.last_name, departments.department_name, departments.location_id FROM employees e, departments D WHERE e.department_id = d.department_id;

C. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE manager_id = manager_id;

D. SELECT e.last_name, d.department_name, d.location_id FROM employees e, departments D WHERE e.department_id = d.department_id;

ned by the employee.Which three tasks would require subqueries or joins in order to perform in a single step？（）

A. Deleting the records of employees who do not earn commission.

B. Increasing the commission of employee 3 by the average commission earned in department 20.

C. Finding the number of employees who do NOT earn commission and are working for department 20.

D. Inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3.

E. Creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSIONS of the EMP table.

F. Decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more then 800.

A．

B．

C．

D．

ws the monthly commission earned by the employee.Which three tasks would require subqueries or joins in order to be performed in a single step？（）

A.deleting the records of employees who do not earn commission

B.increasing the commission of employee 3 by the average commission earned in department 20

C.finding the number of employees who do NOT earn commission and are working for department 20

D.inserting into the table a new employee 10 who works for department 20 and earns a commission that is equal to the commission earned by employee 3

E.creating a table called COMMISSION that has the same structure and data as the columns EMP_ID and COMMISSION of the EMP table

F.decreasing the commission by 150 for the employees who are working in department 30 and earning a commission of more than 800

A.to find the tax percentage for each of the employees

B.to list the name, job_id, and manager name for all the employees

C.to find the name, salary, and the department name of employees who are not working with Smith

D.to find the number of employees working for the Administrative department and earning less than 4000

E.to display name, salary, manager ID, and department name of all the employees, even if the employees do not have a department ID assigned