basics-of-sets-and-relational-algebra-3.txt

# Databases > Relational Algebra > Basics of Sets and Relations #3
# Problems based on the basics of sets and relations.
#
# https://www.hackerrank.com/challenges/basics-of-sets-and-relational-algebra-3/problem
#

# les éléments de A moins les éléments de B: il ne reste que 1

1