72、View the exhibit for the structure of the STUDENTand FACULTYtables.

STUDENT

Name Null? Type

---

STUDENT_ID NOT NULL NUMBER(2)

STUDENT_NAME VARCHAR2(20)

FACULTY_ID VARCHAR2(2)

LOCATION_ID NUMBER(2)

FACULTY

Name Null? Type

---

FACULTY_ID NOT NULL NUMBER(2)

FACULTY_NAME VARCHAR2(20)

LOCATION_ID NUMBER(2)

You need to display the faculty name followed by the number of students handled by the faculty at the base location.

Examine the following two SQL statements:

Statement 1

SQL>SELECT faculty_name, COUNT(student_id)

FROM student JOIN faculty

USING (faculty_id, location_id)

GROUP BY faculty_name;

Statement 2

SQL>SELECT faculty_name, COUNT(student_id)

FROM student NATURAL JOIN faculty

GROUP BY faculty_name;

Which statement is true regarding the outcome?

A. Only statement 2 executes successfully and gives the required result.

B. Only statement 1 executes successfully and gives the required result.

C. Both statements 1 and 2 execute successfully and give different results.

D. Both statements 1 and 2 execute successfully and give the same required result.

Correct Answer: A

轉載于:https://blog.51cto.com/13854012/2360062

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