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RowNumber in Collection per Category

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Posted on by Matt8

Hello,

first of all I want to thank all the people writing in this place. I have learned so much since I started with PowerApps one year ago.

There is one problem I have, I did not found a solution in the internet.

I have a simple Collection with 3 columns, in the example I use Company and Model, plus an added RowNumber column.

I would like to use a RowNumber starting with 1 for each Company.

Company	Model	RowNumber ByCompany
Ford	F150	1
Ford	Edge	2
Ford	Ranger	3
Ford	P100	4
BMW	Z1	1
BMW	321	2
Honda	Accord	1
Honda	Civic	2
Honda	S2000	3

It is no problem for me to add a RowNumber of all records (1, 2, 3, 4, 5, 6, 7, 8, 9) in the Collection.

But this rank by Company gives me headache for 2 days now.

Can someone please help me?

Thank you

Matt

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Matt8 11 on at

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Re: RowNumber in Collection per Category

@gabibalaban

Thanks a lot!
It works like a charm.
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CU-18081211-6 9,266 Super User 2025 Season 1 on at

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Re: RowNumber in Collection per Category

@Matt35 ,

Using your logic, the adapted formula should be:

With( {_records: CollectionName}, ForAll( _records, UpdateIf( CollectionName As baseTable, RowNumber = 0, { RowNumber: Max( Filter( CollectionName, Company = baseTable.Company ), RowNumber ) + 1 } ) ) )
Matt8 11 on at

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Re: RowNumber in Collection per Category

Hi Warren,

thanks for your quick response.

Guess I expressed myself wrong.

The data I collect are only two columns:

Company Model
Ford F150
Ford Edge
Ford Ranger
Ford P100
BMW Z1
BMW 321
Honda Accord
Honda Civic
Honda S2000

While collecting, I am adding a "RowNumber"-column with value 0

ClearCollect(CollectionName, AddColumns(ListName, "RowNumber", 0))

The current situation after collecting is as below:

Company Model RowNumber
Ford F150 0
Ford Edge 0
Ford Ranger 0
Ford P100 0
BMW Z1 0
BMW 321 0
Honda Accord 0
Honda Civic 0
Honda S2000 0

Now my wish is to fill the RowNumber column as marked in my first post in blue.
I would need the RowNumber for later use.

I can use below code to get RowNumbers +1 for each record (1 to 9 in this example):

With( { _records: CollectionName }, ForAll( _records, UpdateIf(CollectionName, RowNumber = 0, {RowNumber: Max(CollectionName, RowNumber)+1}) ) )

But I did not found a way to achieve the goal I have, generating a RowNumber by "Company".

It would be great if there will be a possibility.

Kind regards
Matt
WarrenBelz 146,679 Most Valuable Professional on at

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Re: RowNumber in Collection per Category

Hi @Matt35 ,

Do you simply want each company in RowNumber Order ?

SortByColumns( ListName, "Company", SortOrder.Ascending, "RowNumber", SortOrder.Ascending, )

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