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Question ID 1736

Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:
EMPLOYEES
EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE
NEW_EMPLOYEES
EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2(60)
Which DELETE statement is valid?
 

Option A

A.    DELETE FROM employees
WHERE employee_id = (SELECT employee_id FROM employees);
 

Option B

B.    DELETE FROM employees
WHERE employee_id IN (SELECT employee_id FROM new_employees
WHERE name ='Carrey');
 

Option C

C.    DELETE * FROM employees
WHERE employee_id IN (SELECT employee_id FROM new_employees
WHERE last_name ='Carrey');
 

Option D

D.    DELETE * FROM employees
WHERE employee_id = (SELECT employee_id FROM new_employees);
 

Correct Answer B
Explanation


Question ID 1737

Which are iSQL*Plus commands? (Choose all that apply.)

Option A

A.    INSERT
 

Option B

B.    DELETE
 

Option C

C.    DESCRIBE

 

Option D

D.    RENAME

Correct Answer C
Explanation

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