Unable to create a column based on relationship with another table

[Velocity]

Hi,

I have a table (Table_A) with multiple values of a field (Field_A). There is anothe table (Distinct_Table_B) with only one field (Field_B). There is a one to many relation built from Field_B to Field_A.

I want to create a calculated column in Table_A which says 'True' if it finds matching Field_B for Field_A. 

Help requested.

[amitchandak · Accepted solution]

@Velocity 

New column in Table_A

New Column = if(isblank(countx(filter(Distinct_Table_B,Distinct_Table_B[Field_B]= Table_A[Field_A] ),Distinct_Table_B[Field_B])),"No","Yes")

[Ashish_Mathur · Accepted solution]

Hi,

In Table_A, create this calculated column formula

=IF(ISBLANK(RELATED(Distinct_Table_B[Field_B])),FALSE(),TRUE())

Hope this helps.

[Velocity]

Thanks @Ashish_Mathur 

[Ashish_Mathur]

You are welcome.

[amitchandak · Accepted solution]

@Velocity 

New column in Table_A

New Column = if(isblank(countx(filter(Distinct_Table_B,Distinct_Table_B[Field_B]= Table_A[Field_A] ),Distinct_Table_B[Field_B])),"No","Yes")

[Velocity]

Thanks @amitchandak. However, i have not understood the role of countx in this expression. Can you please explain?

[amitchandak]

I am creating a calculating column to get data from unrelated tables using the choice of filters. So I just counted if it present in another table. It will return blank for no match. We can also use minx and maxx.

** unrelated  - the way we are using it as of now.

[Velocity]

@amitchandak 

...but since the tables are related (There is a one to many relation built from Field_B to Field_A), is there a better way of handling it? When there are millions of records in Table_A, it will be very time consuming.