How do you create a column that populates itself with the current date that doesn't change?

[deanbland]

Hi, I need a column that I can add to multiple fields that populates itself with the date the report is refreshed and then doesn't change, even after refreshing again. Is it possible to only populate the blank spaces in the column? -everytime a new datasource is uploaded, the new cells in that column will initially be blank and only then will it populate them with the current date; currently populated cells remain unchanged. Thanks, Dean

[v-jayw-msft]

Hi @deanbland ,

Sounds like Incremental refresh. Please check the document below.

https://docs.microsoft.com/en-us/power-bi/admin/service-premium-incremental-refresh 

You could create a custom column with Today() function then manage Incremental refresh.

Best Regards,

Jay

[amitchandak]

@deanbland , Not very clear. Refer

https://www.enhansoft.com/how-to-add-the-last-refreshed-date-and-time-to-a-power-bi-report/

[deanbland]

Apologies, let me try and explain better... 

Lets say I have three reports: A, B & C. All reports feed into Power Bi. I want to add a column labeled "Update Date" to A, B & C that populates itself with the current date of when the reports were updated. 

For example, report A is updated on the 24/08/2020 and so that date populates cells within the Update Date column. Report B is updated 4 days later on the 28/08/2020, and so that date is populated into the cells in the Update Date column. 

What I also need is for these dates to remain the same when an updated version is loaded in. 

For example, report A's last update was on the 01/10/2020 and that date populates cells within the Update Date column currently. I now need to update report A today, on the 11/11/2020. I would like cells within the Update Date column currently, populated with 01/10/2020, to stay the same and only the additional data from the update to be populated with the new date.  (rough example below)