I have the two df as following:
Df 1:
Student ID Idclass
1, 1
2, 2
3, 1
4, 1
Df 2:
IdClass Class
1, A1
2, A2
Desired Output
StudentId IdClass Class
1, 1, A1
2, 2, A2
3, 1, A1
4, 1, A1
I think I should merge these df but Idk how.