Unpivot Table but Auto Generate New Rows

[derickyy]

Hi,

Can you please help me with the following table manipulation? It would be best if it can be achieved through power query but dax query is also acceptable.

Basically, I have one table with persons' names and their starte_number and end_number values. I want to create rows with numbers that fall into the start_number and end _number range for each person.

Please refer to the tables below:

Raw data:

Person	Start Number	End Number
A	2	6
B	3	5
C	1	4
D	5	8

Output:

Person	Number
A	2
A	3
A	4
A	5
A	6
B	3
B	4
B	5
C	1
C	2
C	3
C	4
D	5
D	6
D	7
D	8

Please let me know if anyone has any thoughts on this. Thanks in advance!

[edhans · Accepted solution]

Here you go @derickyy 

This:

becomes this

Here is the full M code, and then I'll explain what I did.

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTICYjOlWJ1oJScgyxiITcE8ZyDLEIhNwDwXsLiOkoVSbCwA", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Person = _t, #"Start Number" = _t, #"End Number" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Start Number", Int64.Type}, {"End Number", Int64.Type}}),
    #"Added Custom" = Table.AddColumn(#"Changed Type", "Range", each {[Start Number]..[End Number]}),
    #"Removed Other Columns" = Table.SelectColumns(#"Added Custom",{"Person", "Range"}),
    #"Expanded Range" = Table.ExpandListColumn(#"Removed Other Columns", "Range")
in
    #"Expanded Range"

Ignore the SOURCE row. That is just me pasting in your sample data.

I changed the start/end to integers.

The custom column I added a range using a list. So {1..5} will give me a list of 1, 2, 3, 4, 5. So your start/end numbers looked like this:

Then I only kept the Person and new Range column.

Finally, I expanded the Range to new rows.

Any questions, let me know!

How to use M code provided in a blank query:
1) In Power Query, select New Source, then Blank Query
2) On the Home ribbon, select "Advanced Editor" button
3) Remove everything you see, then paste the M code I've given you in that box.
4) Press Done
5) See this article if you need help using this M code in your model.