topic Re: Compare dates not working in DAX Commands and Tips

Compare dates not working

Anonymous — Mon, 03 Aug 2020 14:54:28 GMT

Hi there,

my aim is to compare two dates within an if clause.

Naturally, the formula should show all values, if their date is larger than my selected date (03.08.2020).

But I don't know why the following dax is not working

Ø Annual Turnover (EUR) Done = IF( MAX('NPLM Import'[Plan R@R (internal) Date]) >= (DATE(MAX(Dates[Year]), MAX(Dates[MonthOfYear]), 1+MAX(Dates[DayOfMonth]))), IFERROR(SUM('NPLM Import'[Yearly average turnover (EUR)]), "") )

Replacing the part after >= with MAX('Dates'[Date]) oder SELECTEDVALUE('Dates'[Date]) is either giving me no values or shows all values.

It works fine when I replace it with a date(2020,08,03) or today(), but I need to have it dynamically with a date slicer.

Ø Annual Turnover (EUR) Done = IF( MAX('NPLM Import'[Plan R@R (internal) Date]) >= (DATE(2020,08,03)), IFERROR(SUM('NPLM Import'[Yearly average turnover (EUR)]), "") )

Is there a way to avoid this bug?

Re: Compare dates not working

Greg_Deckler — Mon, 03 Aug 2020 15:04:30 GMT

Not really enough information to go on, please first check if your issue is a common issue listed here: https://community.powerbi.com/t5/Community-Blog/Before-You-Post-Read-This/ba-p/1116882

Also, please see this post regarding How to Get Your Question Answered Quickly: https://community.powerbi.com/t5/Community-Blog/How-to-Get-Your-Question-Answered-Quickly/ba-p/38490

The most important parts are:
1. Sample data as text, use the table tool in the editing bar
2. Expected output from sample data
3. Explanation in words of how to get from 1. to 2.

Re: Compare dates not working

Anonymous — Tue, 04 Aug 2020 10:03:23 GMT

There are things which are wrong about this formula. And certainly there is no bug in DAX itself. How many time do I read/hear people saying "It must be a bug" only to show them that it's not a bug but their misunderstanding of DAX? Same story here 🙂

First, if your [Plan R@R (internal) Date] is connected to Dates, then no wonder you don't get anything as a result. If you think carefully about what the below does:

MAX('NPLM Import'[Plan R@R (internal) Date]) >= DATE( MAX(Dates[Year]), MAX(Dates[MonthOfYear]), 1+MAX(Dates[DayOfMonth]) )

you'll find out immediately that the first MAX can't be greater than the RHS of the inequality.

Secondly, what's the purpose of ISERROR? Do you really expect to get an error from

SUM('NPLM Import'[Yearly average turnover (EUR)])?

If you do, then it means there's something seriously wrong with your data model

Re: Compare dates not working

Anonymous — Tue, 04 Aug 2020 13:21:22 GMT

Solved the problem myself.

The problem was that several dates had to be evaluated while only one was expected. I changed the "Dates" part with a new column which only shows the first date of each week for each date.

Ø Annual Turnover (EUR) Done = IF( MAX('NPLM Import'[Plan R@R (internal) Date]) >= SELECTEDVALUE('Dates(2)'[StartofWeek]), IFERROR(SUM('NPLM Import'[Yearly average turnover (EUR)]), "") )

Btw: There is nothing wrong with my dataset and connections are still maintained as before. My original post (https://community.powerbi.com/t5/DAX-Commands-and-Tips/Compare-dates/m-p/1268717) which was marked as spam, disappeared and suddenly returned, did help me solve the issue instead of instructing me.