Possible to create a Unique Key when using Direct Query?

[DRing]

I have a data model which has many to many relationships between several tables. I've provided one example below, where the relationship in the model is FACT_CALL_TABLE.Advertisement_ID to DIM_AD_TABLE.Advertisement_ID. This relationship is many-to-many, however the combinaton of Advertisement_ID & Store_Location makes the relationship many-to-one.

Is it possible for me to join Advertisement_ID and Store_Location to create a unique key between both tables?

[Anand24 · Accepted solution]

Hi @DRing ,
You definely can do this in Power BI.
You need to create a calculated column in both tables. This calculated column should concatenate Advertisement_ID and Store_Location. Now join FACT_CALL_TABLE and DIM_AD_TABLE using this new calculated column.

Below would be your DAX for Calculated column in FACT_CALL_TABLE:
Unique_Key_Fact_Table = CONCATENATE(FACT_CALL_TABLE[Advertisement_ID], FACT_CALL_TABLE[Store_Location])

Below would be your DAX for Calculated column in DIM_AD_TABLE:
Unique_Key_Dim_Table = CONCATENATE(DIM_AD_TABLE [Advertisement_ID], DIM_AD_TABLE [Store_Location])

Now go to model view and join both tables on FACT_CALL_TABLE.Unique_Key_Fact_Table = DIM_AD_TABLE.Unique_Key_Dim_Table

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[DRing]

Bravo @Anand24 !

[Anand24 · Accepted solution]

Hi @DRing ,
You definely can do this in Power BI.
You need to create a calculated column in both tables. This calculated column should concatenate Advertisement_ID and Store_Location. Now join FACT_CALL_TABLE and DIM_AD_TABLE using this new calculated column.

Below would be your DAX for Calculated column in FACT_CALL_TABLE:
Unique_Key_Fact_Table = CONCATENATE(FACT_CALL_TABLE[Advertisement_ID], FACT_CALL_TABLE[Store_Location])

Below would be your DAX for Calculated column in DIM_AD_TABLE:
Unique_Key_Dim_Table = CONCATENATE(DIM_AD_TABLE [Advertisement_ID], DIM_AD_TABLE [Store_Location])

Now go to model view and join both tables on FACT_CALL_TABLE.Unique_Key_Fact_Table = DIM_AD_TABLE.Unique_Key_Dim_Table

Give a Thumbs Up if this post helped you in any way and Mark This Post as Solution if it solved your query !!! Proud To Be a Super User !!! LinkedIn

[DRing]

@Anand24  This can be done while using Direct Query?

[Anand24 · Accepted solution]

@DRing ,
Yes.

In case you don't want to use CONCATENATE function, you can simply use FACT_CALL_TABLE[Advertisement_ID] & FACT_CALL_TABLE[Store_Location] for concatenating.

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