Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables:
Which MERGE statement is valid?
A. MERGE INTO new_employees c
USING employees e
ON (c.employee_id = e.employee_id)
WHEN MATCHED THEN
UPDATE SET
C.name = e.first_name ||’, ‘|| e.last_name
WHEN NOT MATCHED THEN
INSERT value
S(e.employee_id, e.first_name ||’,
‘||e.last_name);
B. MERGE new_employees c
USING employees e
ON (c.employee_id = e.employee_id)
WHEN EXISTS THEN
UPDATE SET
C.name = e.first_name ||’, ‘|| e.last_name
WHEN NOT MATCHED THEN INSERT
valueS(e.employee_id, e.first_name ||’,
‘||e.last_name);
C. MERGE INTO new_employees cUSING employees e
ON (c.employee_id = e.employee_id)
WHEN EXISTS THEN
UPDATE SET
C.name = e.first_name ||’, ‘|| e.last_name
WHEN NOT MATCHED THEN
INSERT
value
S(e.employee_id, e.first_name ||’,
‘||e.last_name);
D. MERGE new_employees c
FROM employees e ON (c.employee_id = e.employee_id)
WHEN MATCHED THEN
UPDATE SET
c.name = e.first_name ||’, ‘|| e.last_name
WHEN NOT MATCHED THEN
INSERT INTO
new_employees valueS(e.employee_id, e.first_name ||’,
‘||e.last_name);
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