How to update or insert row using single condition?

Question

If you insert a row in a table, then create another table and then say Rollback. In this case will the row be inserted?

Answer 1

MERGE INTO dept d
USING emp e
ON (d.deptno = e.deptno)
WHEN MATCHED
THEN
UPDATE SET d.name = e.ename,
d.job = e.job,
d.salary = e.salary,
d.deptno = e.deptno
WHEN NOT MATCHED
THEN
INSERT VALUES (e.ename,
e.job,
e.salary,
e.deptno);