I have two tables (below) related by Group ID. Table one is a list of users belonging to groups. Their roles are indicated by the [Role] column. I would like to take and roll up the values from [Person Name] by [GroupID], also filtering by [Role]="GH" . The second table would be the desired result. I can do this in M by filtering Table, joining it to 2, and Grouping By. HOWEVER, I also need a column that rollus up [Role]=RWs and duplicating the large table to join it twice doesn't make sense. I imagine there is a way to do this both in DAX (ConcatenateX) and more efficiently in M. TIA
TABLE 1
GroupID | Role | Person Name
340 GH Joe Smith
340 GH Tim Grogan
340 RW Jenny Slate
240 GH Barbara Wexham
240 GH Jimmy Neutron
TABLE 2
GroupID | Person Name
340 Joe Smith;Tim Grogan; Barbara Wexham
240 Jimmy Neutron
