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Anonymous's avatar
Anonymous
Not applicable
1 year ago
Solved

Calculating maximum time between two records

Hello, I have a dashboard that I use for statistics on incident reports. I use a measure to calculate the working days between today and the last incident posted in my database. Here's the measure...
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  • timalbers's avatar
    timalbers
    1 year ago

    Yea my bad, as _incidents is a virtual table inside the same expression, DAX expects column references without the table name.

    If you want to also include the time between the last incident and today, we will have to add some more variables inside the measure. Just append this to the existing variables and replace the RETURN row:

    VAR last_incident = MAXX( FILTER( Incident, Incident[TypeAccident] = "AT" ), Incident[DateAndTime] )

VAR last_vs_today =
    COUNTROWS(
        FILTER(
            Dates,
            Dates[Date] > last_incident &&
            Dates[Date] <= TODAY() &&
            WEEKDAY( Dates[Date], 2 ) < 6
        )
    )

RETURN MAX( _max, last_vs_today )

     

timalbers's avatar
timalbers
Skilled Sharer
1 year ago

Hi Anonymous 

try something like this:

Measure =
VAR _incidents =
    ADDCOLUMNS(
        FILTER( Incident, Incident[TypeAccident] = "AT" ),
        "prev_incident",
        CALCULATE(
            MAX( Incident[DateAndTime] ),
            FILTER(
                ALL( Incident ),
                Incident[DateAndTime] < EARLIER( Incident[DateAndTime] ) &&
                Incident[TypeAccident] = "AT"
            )
        )
    )

VAR _max =
    MAXX(
        _incidents,
        COUNTROWS(
            FILTER(
                Dates,
                Dates[Date] > _incidents[prev_incident] &&
                Dates[Date] <= _incidents[DateAndTime] &&
                WEEKDAY( Dates[Date], 2 ) < 6
            )
        )
    )

RETURN _max

 
1. The _incidents variable contains each incident and the date of the previous incident.
2. The _max variable finds the highest count of working days between two incidents.

Anonymous's avatar
Anonymous
Not applicable
1 year ago

Hi timalbers , your solution worked witth a little tweek on the MAXX measure.

 

Here's the final measure :

Measure = 
VAR _incidents =
    ADDCOLUMNS(
        FILTER( Incident, Incident[TypeAccident] = "AT" ),
        "prev_incident",
        CALCULATE(
            MAX( Incident[DateAndTime] ),
            FILTER(
                ALL( Incident ),
                Incident[DateAndTime] < EARLIER( Incident[DateAndTime] ) &&
                Incident[TypeAccident] = "AT"
            )
        )
    )

VAR _max =
    MAXX(
        _incidents,
        COUNTROWS(
            FILTER(
                Dates,
                Dates[Date] > [prev_incident] &&
                Dates[Date] <= [DateAndTime] &&
                WEEKDAY( Dates[Date], 2 ) < 6
            )
        ) 
    )

RETURN _max

 

I would like to add a small modification.

 

For the moment, it shows the highest count of working days between two incidents.

 

But when the highest count is between the last incident and today, it still show the highest count of working days between two incident.

 

Do you think it's possible to add this in the measure.

 

Again thanks for your help and have a nice day.

 

BR,

 

Philippe 

  • timalbers's avatar
    timalbers
    Skilled Sharer
    1 year ago

    Yea my bad, as _incidents is a virtual table inside the same expression, DAX expects column references without the table name.

    If you want to also include the time between the last incident and today, we will have to add some more variables inside the measure. Just append this to the existing variables and replace the RETURN row:

    VAR last_incident = MAXX( FILTER( Incident, Incident[TypeAccident] = "AT" ), Incident[DateAndTime] )

VAR last_vs_today =
    COUNTROWS(
        FILTER(
            Dates,
            Dates[Date] > last_incident &&
            Dates[Date] <= TODAY() &&
            WEEKDAY( Dates[Date], 2 ) < 6
        )
    )

RETURN MAX( _max, last_vs_today )

     

    • Anonymous's avatar
      Anonymous
      Not applicable
      1 year ago

      Thanks again timalbers , it works like a charm.

      Have a really nice day.

      Br,

       

      Philippe

    • Anonymous's avatar
      Anonymous
      Not applicable
      1 year ago

      timalbers  Sorry to bother you again, but when I moved your DAX to my real file, it's was not working anymore.

      In the Sample file, it seems to work fine, but in my real file no.

      The big difference between the two file is that I have much more record in the real file, and also I have different sites (for each factory) and i have slicers for the different sites.

       

      Here's the DAX in my real file :

      Record de jours sans accidents = 
VAR _incidents =
    ADDCOLUMNS(
        FILTER( 'Accidents du travail', 'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt" ),
        "prev_incident",
        CALCULATE(
            MAX( 'Accidents du travail'[Date et heure.1]),
            FILTER(
                ALL( 'Accidents du travail' ),
                'Accidents du travail'[Date et heure.1] < EARLIER( 'Accidents du travail'[Date et heure.1] ) &&
                'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt"
            )
        )
    )

VAR _max =
    MAXX(
        _incidents,
        COUNTROWS(
            FILTER(
                'Calendar',
                'Calendar'[Date] > [prev_incident] &&
                'Calendar'[Date] <= [Date et heure.1] &&
                WEEKDAY( 'Calendar'[Date], 2 ) < 6
            )
        ) 
    )

VAR last_incident = MAXX( FILTER( 'Accidents du travail', 'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt" ), 'Accidents du travail'[Date et heure.1] )

VAR last_vs_today =
    COUNTROWS(
        FILTER(
            'Calendar',
            'Calendar'[Date] > last_incident &&
            'Calendar'[Date] <= TODAY() &&
            WEEKDAY( 'Calendar'[Date], 2 ) < 6
        )
    )-1

RETURN MAX( _max, last_vs_today )

       

      My other problem is also that i would like that if there's not and older incident than an incident, it doesn't make the difference between this incident and the start of my date table (I don't know if I'm clear here 😂 ).

       

      It would be very cool if you could help me.

      Tell me if you need more insight on my problem.

       

      Thanks again.

      BR,

       

      Philippe.

      • timalbers's avatar
        timalbers
        Skilled Sharer
        1 year ago

        Hi Anonymous 

        regarding the start date issue, you could just add a filter on the _incidents VAR. I added another VAR after it, called _filtered_incidents. It filters out all records where there is no prev incident.

         

        Here's what the updated code might look like:
         

        Record de jours sans accidents =
VAR _incidents =
    ADDCOLUMNS(
        FILTER( 'Accidents du travail', 'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt" ),
        "prev_incident",
        CALCULATE(
            MAX( 'Accidents du travail'[Date et heure.1]),
            FILTER(
                ALL( 'Accidents du travail' ),
                'Accidents du travail'[Date et heure.1] < EARLIER( 'Accidents du travail'[Date et heure.1] ) &&
                'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt"
            )
        )
    )

VAR _filtered_incidents =
    FILTER(
        _incidents,
        NOT( ISBLANK( [prev_incident] ) )
    )

VAR _max =
    MAXX(
        _filtered_incidents,
        COUNTROWS(
            FILTER(
                'Calendar',
                'Calendar'[Date] > [prev_incident] &&
                'Calendar'[Date] <= [Date et heure.1] &&
                WEEKDAY( 'Calendar'[Date], 2 ) < 6
            )
        )
    )

VAR last_incident = MAXX( FILTER( 'Accidents du travail', 'Accidents du travail'[Type d'accident du travail] = "AT avec arrêt" ), 'Accidents du travail'[Date et heure.1] )

VAR last_vs_today =
    COUNTROWS(
        FILTER(
            'Calendar',
            'Calendar'[Date] > last_incident &&
            'Calendar'[Date] <= TODAY() &&
            WEEKDAY( 'Calendar'[Date], 2 ) < 6
        )
    )-1

RETURN MAX( _max, last_vs_today )

         

        You also said, that something isn't working in your productive file? It's hard to tell.. Maybe you could elaborate a little what exactly the issue is? I will try my best to get this running...