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dd321's avatar
dd321
Frequent Visitor
7 years ago
Solved

Filter with multiple relationship

Hi all,   I'm currently using PowerBI to visualize values in my local database using Direct Query. Example of my entities (simplified, not real entities in my database) but illustrates the relation...
Need Help
  • tex628's avatar
    tex628
    7 years ago

    Doublecheck the data type on GradeValue.Value and make sure that it's still INT.

    If it's int take a look in the visualizations pane and make sure that "Sum" is selected on the settings for GradeValue.Value. 



    This is definitly an issue with dataformatting of some sort. Power BI defaults to aggregation when you have numeric columns so you should never have a scenario like the one you're describing! 

TeigeGao's avatar
TeigeGao
Solution Sage
7 years ago

Hi dd321 ,

In your scenario, it should transfer the filter on Student or University to the GradeValue and Grade table. Because the relationship is one to many, one to many, one to one. 

Best Regards,

Teige

dd321's avatar
dd321
Frequent Visitor
7 years ago

Hi TeigeGao , thank you for you reply and you are correct. The database diagram is what I initially wanted to have.

 

However, the problem is the relationship GradeValue and Grade does not have a one-to-one relationship in the database because in the database, there is only one table GradeValue where each row has foreign key to Student table and foreign key to Grade table. This means there are multiple rows which references to the same row in Grade table, therefore the relationship is:

University  1--N  Student

Student  1--N  GradeValue

GradeValue  N--1  Grade 

 

Also check my previous reply to tex628  :)