A power query solution
let
T1 = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
T2 = Excel.CurrentWorkbook(){[Name="Table2"]}[Content],
MQ = Table.NestedJoin(T1, {"HHS"}, T2, {"Column1"}, "T3", JoinKind.RightOuter),
#"Expanded T3" = Table.ExpandTableColumn(MQ, "T3"...