|Que.||Which of the following is true?
I. Implementation of self-join is possible in SQL with table alias.
II. Outer-join operation is basic operation in relational algebra.
III. Natural join and outer join operations are equivalent.
|a.||I and II are correct|
|b.||II and III are correct|
|c.||Only III is correct|
|d.||Only I is correct|
|Answer:Only I is correct|