Find correspondence between two field

[Istwineres]

Hi, I'm looking for a solution for this, two columns then grouped by column A how to find every match in the other column

A     |   B

-----------

xyz  |   1

xyz  |   2

abc  |   4

abc  |   5

the desidered output should be:

A  |  B

--------

xyz | 1

       | 2 

abc | 4

       | 5

Thanks

[Qiu · Accepted solution]

@Istwineres 

Hope this works for you.