Set Theory

Relational Algebra has evolved from the set theory you may have experienced in school.
A set is a collection zero of more elements, where each element is unique.

  • S = {A, B} is a set with the elements A and B.
  • A ε S A is an element of S
  • {A} ⊂ {A,B} is a subset
  • {} or Ø is an empty set.

Go to Tutorial 2