Identify the most recent data

[Anonymous]

Hi,

I have a data dump from a vehicle tracking system, that records the time, location etc each time a vehicle's ignition is switched on or off. A simplified view is as below:

Vehicle	Status	Time	Location
Vehicle A	START	14/07/2020 14:44	N26°08.853 E049°53.233
Vehicle A	STOP	14/07/2020 13:59	N26°08.050 E049°52.450
Vehicle A	START	14/07/2020 13:29	N26°14.482 E049°59.775
Vehicle A	STOP	14/07/2020 11:59	N26°15.993 E050°01.205
Vehicle A	START	14/07/2020 11:43	N26°10.472 E049°55.988
Vehicle B	STOP	14/07/2020 19:29	N24°07.455 E049°06.635
Vehicle B	START	14/07/2020 19:14	N24°12.902 E049°05.660
Vehicle B	STOP	14/07/2020 18:29	N24°42.993 E049°05.212
Vehicle B	START	14/07/2020 17:59	N24°43.668 E049°05.543

I have then created a second table which just lists the vehicles. How can I populate that table with only the most recent records from the data dump (the blue lines above)?

Thanks!

[richbenmintz]

Hi @Anonymous,

Wow @parry2k and @Fowmy  are fast, 

Another approach would be to derive the rows you are looking for during data ingestion. see the linked .pbix.

essentially ranks the data in power query then creates a filtered table  where the rank = 1

sample.pbix 

[Anonymous]

I like the look of your solution, saves the need for the second table, but I'm not sure how you got to the stage in your screenshot? I have very limited knowledge of the query editor 😕

[Fowmy · Accepted solution]

@Anonymous 

Add this in your vehicles table:

Lastest Time = CALCULATE(MAX('Table'[Time]),'Table'[Vehicle]=EARLIER(VEHICLES[Vehicle]))

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[Anonymous]

Sorry, thought that was all I needed - how can I edit that to pull through the other columns (status, location etc)?

[Fowmy]

@Anonymous 

If you need a new table that brings only the records for each vehicle with its latest date, add this code by clicking on the New Table under Home tab:

Latest Dates Table= 
FILTER(
    'Table',
    VAR _MAX = 
        CALCULATE(
            MAX('Table'[Time]),
            ALLEXCEPT('Table',VEHICLES[Vehicle])
        )
    RETURN
    'Table'[Time] = _MAX
)

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[Anonymous]

Thank you! I think this is exactly what we need 👍

[parry2k]

@Anonymous add a measure using following expression:

Recent Date = 
CALCULATE ( MAX ( Table[Date] ), ALLEXCEPT ( Table, Table[Vehicle] ) ) 

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[Anonymous]

Thank you! Thought it was an easy thing, I was just missing EARLIER.