DAX statement based on multiple conditions

[alexpork]

Hello,

I am currently trying to use DAX to add a TIMEDIFF column based on multiple conditions below:

IF the ID is the same, and the Signifier column has a DSCN value followed by a RECO value on the same day, add a column that subtracts the time difference between those two rows. 

For example, since the second row and third row fulfills these conditions, it would subtract 17:17 and 8:31 and add the difference in a new column.

[AlB]

Hi @alexpork 

Please always show your sample data in text-tabular format in addition to (or instead of) the screen captures. A screen cap doesn't allow people to readily copy the data and run a quick test and thus decreases the likelihood of your question being answered. Just use 'Copy table' in Power BI and paste it here.

Create a new calculated column in your table:

New column =
IF (
    Table1[Signifier] = "RECO",
    VAR previousRowInDay_ =
        CALCULATETABLE (
            ROW (
                "Signifier_", MAX ( Table1[Signifier] ),
                "DateTime_", MAX ( Table1[DateTime] )
            ),
            ALLEXCEPT ( Table1, Table1[ID] ),
            INT ( Table1[DateTime] ) = INT ( EARLIER ( Table1[DateTime] ) ),
            Table1[DateTime] < EARLIER ( Table1[DateTime] )
        )
    VAR isDSCN_ = MAXX ( previousRowInDay_, [Signifier_] ) = "DSCN"
    VAR previousTimeInDay_ = MAXX ( previousRowInDay_, [DateTime_] )
    VAR diffInMins_ = IF ( isDSCN_, ( Table1[DateTime] - previousTimeInDay_ ) * 24 * 60 )
                 // Time difference converted to minutes. Update if another unit required
    RETURN
        diffInMins_
)

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Cheers