Calculations between two tables

36048419 

Ensure Relationships in the Model:

Table A (Roomnumber) connects to Table B (Type, Capacity) using Roomnumber.
Table A also connects to Table C (Type, number of boxes) using Roomnumber.

Create measures:

Total Capacity = 
SUMX(
TableB,
RELATED(TableA[Roomnumber]) * TableB[Capacity]
)

Total Boxes = 
SUMX(
TableC,
RELATED(TableA[Roomnumber]) * TableC[Number of boxes]
)

Remaining Capacity = 
[Total Capacity] - [Total Boxes]

Create a Matrix Visual:
Add Roomnumber to the rows.
Add Type to the columns.
Add the Remaining Capacity measure to the values.

💌 If this helped, a Kudos 👍 or Solution mark ✔️ would be great! 🎉
Cheers,
Kedar
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Hi 36048419 ,

I'm not sure what's your model and data looks like, could you please provide some sample data in the involved 3 tables(exclude sensitive data) with Text format and your expected result with backend logic and special examples. It would be helpful to find out the solution. You can refer the following link to share the required info:

How to provide sample data in the Power BI Forum

And It is better if you can share a simplified pbix file. You can refer the following link to upload the file to the community. Thank you.

How to upload PBI in Community

In addition, you can refer the following links to achieve it by yourself.

1. Get the value from another table

powerbi - How to return a value from a row based on another column in power BI? - Stack Overflow

2. Create a matrix visual

Create a matrix visual in Power BI - Power BI | Microsoft Learn

Power BI Matrix: A Comprehensive Guide | DataCamp

Best Regards