1 votes 1 votes With the help of which of the following relations operation set can a division operation on relations be performed? $\left \{ selection, \times,- \right \}$ $\left \{ \times,- \right \}$ $\left \{ \times \right \}$ $\left \{ projection, \times, -\right \}$ Databases tbb-mockgate-4 databases relational-algebra + – Bikram asked May 14, 2017 • edited Sep 5, 2019 by Counsellor Bikram 372 views answer comment Share Follow See all 0 reply Please log in or register to add a comment.
Best answer 3 votes 3 votes Division can be implemented with projection, cross product, difference option D akash.dinkar12 answered Aug 1, 2017 • selected Aug 1, 2017 by Bikram akash.dinkar12 comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes When you perform division you filter out some tuples . Now to filter out a tuple projection is used . Also only cross product is not sufficient . "-" is used to separate out that divisor . Bikram answered May 14, 2017 Bikram comment Share Follow See all 0 reply Please log in or register to add a comment.