Populate a new column with data from conditional row

Green_G — Mon, 11 Dec 2023 18:31:35 GMT

Hi,

I am new to Power BI report building and I'm hoping you can help - I'm sure there is a simple solution but I don't know what it is!

I have a table like the one below and want to create an additional column called "ORIGINAL SOURCE" that shows the value in the SOURCE column for EVENT NO 1 in every row for the relevant REF VALUE.

REF	EVENT_NO	SOURCE
001	1	A
001	2	A
001	3	B
001	4	B
001	5	D
002	1	C
002	2	D
002	3	A
002	4	B
002	5	C
002	6	D

So it will look like this:

REF	EVENT_NO	SOURCE	ORIGINAL SOURCE
001	1	A	A
001	2	A	A
001	3	B	A
001	4	B	A
001	5	D	A
002	1	C	C
002	2	D	C
002	3	A	C
002	4	B	C
002	5	C	C
002	6	D	C

I would appreciate anyone's advice on the best way to achieve this.

Many Thanks,

Re: Populate a new column with data from conditional row

smpa01 — Mon, 11 Dec 2023 19:28:13 GMT

Green_G you can write a measure like this

Measure2 = //what is the min event # by REF VAR one = CALCULATE ( MIN ( 'Table 1'[EVENT_NO] ), ALL ( 'Table 1' ), VALUES ( 'Table 1'[REF] ) ) // what is the source when event = one by ref VAR two = CALCULATE ( MIN ( 'Table 1'[SOURCE] ), FILTER ( ALL ( 'Table 1' ), 'Table 1'[EVENT_NO] = one && 'Table 1'[REF] = MAX ( 'Table 1'[REF] ) ) ) RETURN two

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Populate a new column with data from conditional row

Re: Populate a new column with data from conditional row