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LON Regular Visitor
Regular Visitor

Power Query - Join tables based on multiple columns

You can do this in Power Query with Table.Join or Table.NestedJoin; as they are, these functions will join on a single column only; you can circumvent this, by replacing the Table parameters with Table.AddColumn, which can add - on the fly - a new, composite column, to join on, something like:

 

JoinedTable = Table.NestedJoin(Table.AddColumn(Table1, "CompositeColumn1", each [JoinColumn1] & [JoinColumn2]), "CompositeColumn1", Table.AddColumn(Table2, "CompositeColumn2", each [JoinColumn1] & [JoinColumn2]), "CompositeColumn2", "NewCompositeColumn"),

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MitieFred Member
Member

Re: Power Query - Join tables based on multiple columns

 Hi @LON  Thanks for the feedback, must admit I'd forgotten all about this, mainly because I'd worked around it, doing something similar to what you describe, using a DAX formula.

 

Regards

Fred

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