Fill in values if rows the same for a particular column

[ruesaint_denis]

Hi everyone, 

I have a Date column that I would like to fill with values, if the values in the column "Subject" are the same.

Here's a screenshot of my data: 

The first row has subject "Whoop, There it is!..." and Date values for Sent Time, End Time, and Sent Date. The last 2 rows also have the subject "Whoop, There it is!...", but not Date values for Sent Time, End Time, and Sent Date. I would like to somehow copy the Date values in Sent Time, End Time, and Sent Date for the first row of of the subject "Whoop, There it is!...", to the last 2 rows. 

Esstentially, for each subject row, if Date values for Sent Time, End Time, and Sent Date = null, and there is an identical Subject value where Date values for Sent Time, End Time, and Sent Date is not null, copy those Date values.

Is this possible?  

[amitchandak · Accepted solution]

@ruesaint_denis , For each date create new column in DAX like

new start time =
var _max = maxx(filter(table, [subject] =earlier([subject]) && not(isblank([Start Date Email]))), [Start Date Email])
return
if(isblank([Start Date Email]), _max, [Start Date Email])