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Question ID 1540

Which is NOT an SQL*Plus command?

Option A

A.    DESCRIBE
 

Option B

B.    CHANGE

 

Option C

C.    LIST
 

Option D

D.    UPDATE

Correct Answer D
Explanation


Question ID 1541

You attempt to query the database with this command:
SELECT dept_no, AVG(MONTHS_BETWEEN(SYSDATE, hire_date))
 
FROM employee
WHERE AVG(MONTHS_BETWEEN(SYSDATE, hire_date)) > 60 GROUP BY dept_no
ORDER BY AVG(MONTHS_BETWEEN(SYSDATE, hire_date));
Why does this statement cause an error?
 

Option A

A.    A SELECT clause cannot contain a group function.

 

Option B

B.    An ORDER BY clause cannot contain a group function.
 

Option C

C.    A group function cannot contain a single row function.
 

Option D

D.    A WHERE clause cannot be used to restrict groups.

Correct Answer D
Explanation

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