Query editor: bring in value from related table

[CloudMonkey]

Hi,

I have some related tables:

Transaction Line Items -> Transactions -> Branch Details

I need to create a table in the query editor which includes all the rows from the table "Transaction Line Items" and a column from the "Branch Details" table.

I tried to use the "merge queries" tool but this requires two tables to be directly linked (with 2 columns that match), whereas in my situation there is an intermediary table "Transactions" in the relationship. Using query editor please can you tell me how to merge a column from the table "Branch Details" into the "Transaction Line Items" table?

Thanks,

CM

[MarcelBeug · Accepted solution]

First merge Transaction with Branch Details.

Next, merge Transaction Item Lines with the result from the previous merge.

let
    Source = Table.NestedJoin(Transactions,{"Branch ID"},#"Branch Details",{"Branch ID"},"Branch Details",JoinKind.LeftOuter),
    #"Expanded Branch Details" = Table.ExpandTableColumn(Source, "Branch Details", {"Branch"}, {"Branch"}),
    #"Merged Queries" = Table.NestedJoin(#"Transaction Line Items",{"Transaction ID"},#"Expanded Branch Details",{"Transaction ID"},"Transaction",JoinKind.LeftOuter),
    #"Expanded Transaction" = Table.ExpandTableColumn(#"Merged Queries", "Transaction", {"Branch"}, {"Branch"})
in
    #"Expanded Transaction"