I have a flow source
Movie Role Actor
M1 R1 A1,A2
M1 R2 A1,A3
M2 R1 A2
and I need to switch to the vue
Movie R1 R2
M1 A1,A2 A1,A3
M2 A2
how is it possible, I tried AttributePivoter but didn't find a way to switch rows to columns.
The Roles list is not known before, so it should take all unique roles as columns.