Difference between a theta join, equijoin and natural join

Question

I\'m having trouble understanding relational algebra when it comes to theta joins, equijoins and natural joins. Could someone please help me better understand it? If I use t

Answer 1

Natural Join: Natural join can be possible when there is at least one common attribute in two relations.

Theta Join: Theta join can be possible when two act on particular condition.

Equi Join: Equi can be possible when two act on equity condition. It is one type of theta join.