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[M_SBS_6]

Hi, 

I have 2 columns of data, appname and appdate. I have 4 years worth of data.

What I'd like to do is add a column (new app this year) to identify new appname I.e if we take 2024, those that have come in this year onky but we don't have a record of them in the previous 3 years.

Any idea if this is possible please and to also make it work once we hit 2025 on so on please? 

[v-cgao-msft · Accepted solution]

Hi @M_SBS_6 ，

Please try:

Column 1 = 
VAR _max_year = YEAR(MAX('Table'[appdate]))
VAR _cur_appname = 'Table'[appname]
VAR _count = CALCULATE(COUNTROWS('Table'),YEAR('Table'[appdate])<_max_year && 'Table'[appname]=_cur_appname)
VAR _result = IF(ISBLANK(_count),"Yes")
RETURN
_result

or (last 3 years):

Column 2 = 
VAR _max_year = YEAR(MAX('Table'[appdate]))
VAR _min_year = _max_year - 3
VAR _cur_appname = 'Table'[appname]
VAR _count = CALCULATE(COUNTROWS('Table'),'Table'[appname]=_cur_appname && YEAR('Table'[appdate])>=_min_year && YEAR('Table'[appdate])<_max_year)
VAR _result = IF(YEAR('Table'[appdate])=_max_year&&ISBLANK(_count),"Yes")
RETURN
_result

Best Regards,
Gao
Community Support Team

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If I misunderstand your needs or you still have problems on it, please feel free to let us know. Thanks a lot!

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[Ritaf1983]

Hi @M_SBS_6 
It sounds like a new / repeat customers scenario.

Take a look at the attached article.
https://blog.finance-bi.com/power-bi-new-and-repeat-customers/

If it doesn't help 

Please provide sample data that covers your issue or question completely, in a usable format (not as a screenshot).
https://community.powerbi.com/t5/Community-Blog/How-to-provide-sample-data-in-the-Power-BI-Forum/ba-...
Please show the expected outcome based on the sample data you provided.

https://community.powerbi.com/t5/Desktop/How-to-Get-Your-Question-Answered-Quickly/m-p/1447523

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