Which two statements are true about a full outer join?
A.It returns matched and unmatched rows from both tables being joined B.It returns only unmatched rows from both tables being joined C.It includes rows that are returned by a Cartesian product. D.The Oracle join operator (+)must be used on both sides of the join condition in the WHERE正确答案AE
Clause E.It includes rows that are returned by an inner join
