Check if value exists in group

[Attrywa]

Hello everyone!
I need some help in case below:
There are two tables A and B:

And I would need to create an additional flag in dax (1/0) -  if the LogGroup from table B contains LogKey = 124 then mark whole group as 1 (and therefore whole customer as 1) otherwise mark as 0

The logic for this in SQL would be like: 
max( case when B.LogKey = 124 then 1 else 0 end ) OVER (PARTITION BY A.Customer) as Flag

THANK YOU ! 

[v-huijiey-msft · Accepted solution]

Hi @Attrywa ,

Please try:

Create a calculated column in Table A:

Flag =
VAR CurrentGroup = 'Table A'[LogGroupKey]
VAR LogKeyCheck = CALCULATE(
     MAXX(
         RELATEDTABLE('Table B'),
         IF('Table B'[LogKey] = 124, 1, 0)
     ),
     FILTER(
         'Table B',
         'Table B'[LogGroupKey] = CurrentGroup
     )
)
RETURN IF(LogKeyCheck = 1, 1, 0)

The page effect is as follows:

pbix file is attached.

If you have any further questions please feel free to contact me.

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

[ryan_mayu · Accepted solution]

@Attrywa 

you can create a column

Column = if(ISBLANK( maxx(FILTER(TableB,TableB[LogKey]=124&&TableA[LogGroupKey]=TableB[LogGroupKey]),TableB[LogKey])),0,1)

or a measure

Measure =

if(ISBLANK(maxx(FILTER(all(TableB),'TableB'[LogGroupKey]=max('TableA'[LogGroupKey])&&'TableB'[LogKey]=124),TableB[LogKey])),0,1)

pls see the attachment below

[v-huijiey-msft · Accepted solution]

Hi @Attrywa ,

Please try:

Create a calculated column in Table A:

Flag =
VAR CurrentGroup = 'Table A'[LogGroupKey]
VAR LogKeyCheck = CALCULATE(
     MAXX(
         RELATEDTABLE('Table B'),
         IF('Table B'[LogKey] = 124, 1, 0)
     ),
     FILTER(
         'Table B',
         'Table B'[LogGroupKey] = CurrentGroup
     )
)
RETURN IF(LogKeyCheck = 1, 1, 0)

The page effect is as follows:

pbix file is attached.

If you have any further questions please feel free to contact me.

Best Regards,
Yang
Community Support Team

If there is any post helps, then please consider Accept it as the solution  to help the other members find it more quickly.
If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!