Find unique elements for a given column in a table model

Lolo67

I need to find each unique combination in a table

Suppose I have a table that looks like this

Column1 Column2 Column3
A C F
A C F
A D F
B C F
B C G
B D F
B D G
B E F

(1) I need to understand that Column1 is composed by two different elements A and B
(2) Then for each element found in column1 I need to filter the table - the result will be two tables

 Column1  Column2  Column3
   A       C       F
   A       C       F
   A       D       F
 
 Column1  Column2  Column3
   B       C       F
   B       C       G
   B       D       F
   B       D       G 
   B       E       F
 
Then for each table do the same with Column2

Column1  Column2  Column3
   A       C       F
   A       C       F
   
Column1  Column2  Column3   
   A       D       F

  ... and so one with each Column on the table

I suppose thar the filtering of the table can easily be done via QSortFilterProxyModel

However I am not sure what to use to perform operation (1) i.e. to understand for a given column how many different elements the cloumn is composed by..... Maybe someone will have a clever idea to solve this.