Duplicate row for each item in column

Question

I can do things in PowerQuery but I can't find how to achieve the following result:

Before:

After:

The goal is to duplicate the last row (filtered with Project Code=null ) for each item in Project Code column. I think duplicating the row as is is important to keep the Metadata Table and expand it later.

Thank you very much for your help.

Answer 1

Try this

let Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],

AllButLast=Table.RemoveLastN(Source,1),
UniqueProjects=List.Distinct(AllButLast[Project Code]),
OnlyBottomRow = Table.LastN(#"Added Custom", 1),
#"Removed Columns" = Table.RemoveColumns(OnlyBottomRow,{"Project Code"}),
#"Added Custom1" = Table.AddColumn(#"Removed Columns", "Project Code", each UniqueProjects),
#"Expanded Project Code" = Table.ExpandListColumn(#"Added Custom1", "Project Code"),
combined = AllButLast & #"Expanded Project Code" 
in  combined