Power Query - Count the number of unique value in a column based on another column

[akbjf]

Hi folks,

I have a table like "BEFORE", it has the date record for every SITE, on any given month. Site can has several dates on the same month.

What you saw on "AFTER", is the count summarize from "BEFORE". As you can see, on any given month, any given site, we has Date column that is the count distinct of the dates.

How to make AFTER table in Power Query?

Thank you! 

[amitchandak · Accepted solution]

@akbjf , You can create aggregated in power query. There is Group by Option

https://radacad.com/power-bi-aggregation-step-1-create-the-aggregated-table

Summarize in DAX

[Anonymous]

Hi  @akbjf ,

Here are the steps you can follow：

1. Open Power Query

2. Select a column, right-click, and select group by

3. Select advanced and add two columns, Calendar and Site

4. Result.

Best Regards,

Liu Yang

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[PhilipTreacy · Accepted solution]

Hi @akbjf 

Given that example data this query will produce the output you've shown. It groups on the Calendar Month and Site and does a distinct count on date.

Here's an example PBIX file with the query

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45W8krMK00sqlTSUXIEYkN9Q30jAyMDpVgdTCkjbFJOYCkT3FKmuKXMoFKxAA==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"Calendar Month" = _t, Site = _t, Date = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Calendar Month", type text}, {"Site", type text}, {"Date", type date}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"Calendar Month", "Site"}, {{"Date", each Table.RowCount(Table.Distinct(_)), Int64.Type}})
in
    #"Grouped Rows"

Phil

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[amitchandak · Accepted solution]

@akbjf , You can create aggregated in power query. There is Group by Option

https://radacad.com/power-bi-aggregation-step-1-create-the-aggregated-table

Summarize in DAX