Loop Command in Power Query

[aditya]

Hi to all,

Stuck up with large set of data which has multiple variables and overlapping sets of values.

To overcome the same, Through "Power Query", I have managed to get non-overlapped value for single item in sheet 'Length Achieved - Single Item'. (Item1 - A is having value of 400)

However, I'm unable to apply the same with Multiple Item in sheet 'Length Achieved - Multiple Item'.. ((Item1 - A value changes to 950)

I need help in Running Same Sets of Command in Loop. Sheet Attached.

Thanks in Advance..

[#2]

@aditya Not sure if I fully comprehended your problem, but perhaps the attached workbook contains the result you are after. I've added a query "Table1 (2)" that loads a four row table.

[#3]

@Riny_van_Eekelen  Attached solves one part of problem of looping.

However, It is not removing and capturing overlapping & non-overlapping data. Sample data for single item is shown below. And Power Query of Single Item is attached in previous post named as "Length Achieved -Single Item".

Data with same set of (ITEM & SIDE)		Resultant
Item	Side	Start	End	Value		Item	Side	Start	End	LENGTH
Item1	A	100	300	1		Item1	A	100	400	300
Item1	A	200	250	1		Item1	A	500	600	100
Item1	A	100	150	1		Item1	A	750	850	100
Item1	A	500	600	1		Item1	A	900	1000	100
Item1	A	280	400	1
Item1	A	750	800	1		Item1	A			600
Item1	A	800	850	1
Item1	A	900	1000	1

[#4]

@aditya Perhaps like in the attached file. Split off the original query and loaded two tables. One before aggregation and one after.

[#5 · Accepted solution]

@aditya 

As variant, to receive such result

and ignoring column Value in source data, not sure for what it is needed, we may generate list from start to end for each record, group table on Item and Side, as aggregation union lists for the groups and count them. Entire script is

let
    Source = Excel.CurrentWorkbook(){[Name="Table1"]}[Content],
    #"Add column with lists of points" = Table.AddColumn(
        Source,
        "List values",
        each {[Start]+1..[End]}
    ),
    #"Groupe by Items and Sides and count union" = Table.Group(
        #"Add column with lists of points",
        {"Item", "Side"},
        {
            {"Count",
             each List.Count(List.Union([List values]))
            }
        }
    )
in
    #"Groupe by Items and Sides and count union"

[#6]

Thanks, Works exactly with what I was looking for..

I'm beginner level for Power Query, Can you suggest some good book / weblinks for getting more hands on Power Query Advance Commands.

[#7]

@Riny_van_EekelenThanks for the efforts mate.. But it misses ranges between multiple data set as under.

Item1	A	100	300
Item1	A	200	250
Item1	A	100	150
Item1	A	500	600
Item1	A	280	400
Item1	A	750	800
Item1	A	800	850
Item1	A	900	1000

Should provide resultant as

Merged	Start	End	Subtraction
Item1|A	100	400	300
Item1|A	500	600	100
Item1|A	750	850	100
Item1|A	900	1000	100

Hence, Total of Item1|A shall be 600.

Solution provided by @Sergei Baklan covers the same.

Thanks Amigos.

[#8]

@aditya 

You are welcome, glad to help. As for resources - lot of them. You may start from Gil Raviv book https://datachant.com/next/ and his blog, lot of topics on Ken Puls' excelguru.ca , next could be Chris Webb' BI blog.