Copy newly added data to fixed column

[souchock]

Hello,

I am trying to use powerbi to read excel data from a task schedule. But I would like to use PowerBI to show the original scheduled dates, even after the schedule gets updated.

So when new data is entered in Start Date and End Date, I want columns to be populated with that data. 

But once the Original Dates are populated once, I don't want them to ever change again.

So if the Start Date and End Date are adjusted, I want the Original dates to remain static.

Wednesday's new update: Start and End date updated for Task A, but Original didn't change. Now Task B also has newly added dates.

Then on Friday, Task B's dates are adjusted, but the Original dates don't change.

Is there a Dax operation to do this ?

Thanks

[v-xicai]

Hi  @souchock  ,

Does that make sense? If so, kindly mark the proper reply as a solution to help others having the similar issue and close the case. If not, let me know and I'll try to help you further.

Best regards

Amy

[v-xicai]

Hi @souchock ,

You may refer to the links:

https://blog.crossjoin.co.uk/2020/04/13/keep-the-existing-data-in-your-power-bi-dataset-and-add-new-...

https://www.thebiccountant.com/2017/01/11/incremental-load-in-powerbi-using-dax-union/

http://excel-inside.pro/blog/2019/03/21/classical-incremental-refresh-for-cloud-data-sources-in-powe...

Best Regards,

Amy 

Community Support Team _ Amy

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

[vanessafvg]

there is also incremental refeshes if you have premium https://docs.microsoft.com/en-us/power-bi/admin/service-premium-incremental-refresh which might solve your issue

https://radacad.com/all-you-need-to-know-about-the-incremental-refresh-in-power-bi-load-changes-only

[souchock]

Thanks.

Basically what I want to do is create a Baseline data column based on the first date entered for a given row.

(Similar to the MS Project Baseline function)

[vanessafvg]

you will have to keep history if you using the same source and overwriting it. Or create a new field for the original date.

[vanessafvg]

power bi isn't a database as such, you will need to store historic copies of your data if you want retain history.