（）involves comparing actual or planned project practices to those of other projects to generate ideas for improvement and to provide a basis by which to measure performance. These other projects can be within the performing organization or outside of it, and can be within the same or in another application area.

Do you want to pay cash or sign the bill？这句话意思是（）。

You notice a performance change in your production Oracle 12c database. You want to know which change caused this performance difference.
Which method or feature should you use?（）

Quality planning tools are often used to help plan effective quality management activities . （）is one of such tools, which involves company actual or planned project practices to those or other projects to generate ideas for improvement and to provide a basis by which to measure performance.

Examine the data in the EMPLOYEES and DEPARTMENTS tables.
EMPLOYEES
LAST_NAME DEPARTMENT_ID SALARY
Getz 10 3000
Davis 20 1500
Bill 20 2200
Davis 30 5000
Kochhar 5000
DEPARTMENTS
DEPARTMENT_ID DEPARTMENT_NAME
10 Sales
20 Marketing
30 Accounts
40 Administration
You want to retrieve all employees, whether or not they have matching departments in the departments table.
Which query would you use?（）

Click the Exhibit button and examine the data in the EMPLOYEES and DEPARTMENTS tables.
You want to retrieve all employees, whether or not they have matching departments in the departments table. Which query would you use?（）