Question

1 For the relations s and r in your study manual of our chapter 2 (i.e., joining two relations), suppose
we type a collection of relational algebra queries, and get the following results.
A B C D E

Answer 1

It is impossible to answer this question, because collections from the tutorial are not represented, i.e. a set of learning relationships and a set of learning algebra operations. However, a tuple must not contain attribute names like A and B unless s and r have a tuple with those values