Mark table as date table issue

[KenMann]

Hi guys,

In my Fabric Dataset, I have a dimDate table which coming from a csv file, and after looking at the content, it does not have a column with Date type. 

As I'm using this dataset in Power BI Desktop, so I tried to solve this by create new column to table by using function DATE(year, month, day), give the column name "Date"

So when I have this new column "Date", I think I can mark my table as date table. Although it is validated sucessfully I received this error ->

and this after click "Ok"

After googling, found this "old" thread in this forum as well -> https://community.fabric.microsoft.com/t5/Desktop/Not-able-to-click-OK-in-Mark-as-date-table-dialogu...

which mentioned that we need to switch the storage mode to Dual. First of all, am I right to say this is mean Mixed mode ?

But actually my model already Mixed, although the Date table it self is "DirectQuery" and it looks like I cannot change it.

  

May I know how to solve this ?

Thanks.

[v-xinruzhu-msft · Accepted solution]

Hi @KenMann 

The calculated column is based on other columns, so it cannnot be set as a primary key, but you can refer to the following soution.

Create a calcualted table, use the date calculated column you have created.

e.g

Table=Summarize('Dates',[Date])

Then you can set this [Date] column of the new table as a Date table, it can work. and you can refer to the following attachments.

Best Regards!

Yolo Zhu

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

[Syndicate_Admin]

Create your date column in Power Query, not in DAX.