Joins in Relational Algebra (Self Doubt) while reading Elmasri Navathe

Question

No. of tuples obtained as the output of an outer join (left, right or full outer join) is a superset of the no. of tuples obtained in Natural join.

Is the abv. statement TRUE or FALSE?

State with Reason.

Comments

https://csedoubts.gateoverflow.in/blog/1/guidelines-to-users

---

Its true.

outer join always ensure that, unmatched rows also include in the result with NULL on other side depend upon outer join. But Natural join doesn’t.

Some times outer join may produces the result same as Natural join.

By these two, we can conclude that given statement is correct.