New column to Count one to many

[mabuzaid1993]

Hi im super new to power bi , 

The structure i have is 2 tables , programs and projects .

I need a simple new column in my programs table that counts the amount of projects for each program that i have

knowing that i have a one to many relationship with 1 program that have many projects.

[wdx223_Daniel · Accepted solution]

NewColumn=COUNTROWS(RELATEDTABLE(Projects))

[KT_Bsmart2gethe]

Hi @mabuzaid1993 ,

I do understand that you're new to Power BI, and I will do my best to explain the step as clearly as possible.

There are a few ways you can achieve the outcome:

Method 1: 

1. Reference projects table, then apply "Group by" function to do the count.

How to use group by: Grouping or summarizing rows - Power Query | Microsoft Docs

Merge the above table from step 1 to the program table.

How to merge table: Merge queries overview - Power Query | Microsoft Docs

Method 2: Add a Custom Column and apply the formula below

 Table.SelectRows(ProjectTableName, each (x)=> (x[ProjectTableColumnName] = [ProgramTableColumnName]) and (x[ProjectTableColumnName] = [ProgramTableColumnName])) 

Condition1

Condition2

You can add more conditions, joining conditions with and / or.

If all the above does not make sense or does not meet your expectation.

Please kindly share some sample data with sensitive information removed, and a specific solution can be provided.

Regards

KT