Need help on DAX function

[Learner-PBI]

Hi All, I need help on DAX function:

I have need to concatenate 2 columns with "-" b/w the 2 columns to identify value to 2 columns & if the both the columns are blank then it should show value as "null". Please help me on this dax. Thank you!

[bhanu_gautam · Accepted solution]

@Learner-PBI , try this dax
NewColumn =
IF(
ISBLANK('Table'[column1]) && ISBLANK('Table'[column2]),
"null",
IF(
ISBLANK('Table'[column1]),
'Table'[column2],
IF(
ISBLANK('Table'[column2]),
'Table'[column1],
'Table'[column1] & " - " & 'Table'[column2]
)
)
)

[Anonymous · Accepted solution]

Hi @Learner-PBI ,

NewColumn = IF('Table'[column1] = BLANK() && 'Table'[Column2] = BLANK(), "null", 'Table'[Column1] & "-" & 'Table'[Column2])

Or add a condition: connect with ‘-’ only if neither column is blank:

NewColumn = 
SWITCH(
    TRUE(),
    'Table'[Column1]=BLANK() && 'Table'[Column2]=BLANK(), "null",
    'Table'[Column1]=BLANK(), 'Table'[Column2],
    'Table'[Column2]=BLANK(), 'Table'[Column1],
    'Table'[Column1] & "-" & 'Table'[Column2]
)

The logic of the code provided by bhanu_gautam is fine, the problem should be in the emptystring with some features of ISBLANK():

ISBLANK – DAX Guide

Best Regards,
Gao
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!

How to get your questions answered quickly --  How to provide sample data in the Power BI Forum 

[Learner-PBI]

Hi, Thanks for reply. I tried the measure you had shared and I got "Error" & I tried the below function, I got the values concantenated but on the cell which had blank it didnt not show as "null" but instead I got the result as "-"

New column = if(ISBLANK('Table'[column1])&&

ISBLANK('Table'[column2]),"null",

CONCATENATE('Table'[column1],if(ISBLANK('Table'[Column1]),ISBLANK('Table'[column2])," - ")&'Table'[column2]))

[bhanu_gautam]

That's great can you accept my reply as solution if it helped

[Learner-PBI]

Would you please help with the below DAX to show as "null" if column1 & column2 is blank & not "-"

New column = if(ISBLANK('Table'[column1])&&

ISBLANK('Table'[column2]),"null",

CONCATENATE('Table'[column1],if(ISBLANK('Table'[Column1]),ISBLANK('Table'[column2])," - ")&'Table'[column2]))

[bhanu_gautam · Accepted solution]

@Learner-PBI , try this dax
NewColumn =
IF(
ISBLANK('Table'[column1]) && ISBLANK('Table'[column2]),
"null",
IF(
ISBLANK('Table'[column1]),
'Table'[column2],
IF(
ISBLANK('Table'[column2]),
'Table'[column1],
'Table'[column1] & " - " & 'Table'[column2]
)
)
)

[bhanu_gautam]

@Learner-PBI , Try below measure

NewColumn =
IF(
ISBLANK(Table[Column1]) && ISBLANK(Table[Column2]),
"null",
CONCATENATE(
Table[Column1],
IF(
ISBLANK(Table[Column1]) || ISBLANK(Table[Column2]),
"",
"-"
) & Table[Column2]
)
)

[Learner-PBI]

I tried the one you shared & in case of blank it shows "-" & not null