Calculated Column: TIme difference to next rowset

[Anonymous]

Hello:

 I am writing to ask if it is possible to create a calculated column which calculates the time difference ( Duration ) between the next rowset ( timestamp ) ? Please see example below. Thank you for your time.

error num	error text	category num	category text	timestamp	time no millis	Index	short name	Line Name	IndexAll	Duration (Minutes)
3030	S010 MACHINE IS RUNNING	7	MACHINE RUNNING	3/3/2021 16:20	3/3/2021 16:20	368	CX482 S010	CX482 BASELINE ONE	368	7
3000	S010 MACHINE IS IDLE	2	MACHINE IDLE	3/3/2021 16:27	3/3/2021 16:27	369	CX482 S010	CX482 BASELINE ONE	369	3
3030	S010 MACHINE IS RUNNING	7	MACHINE RUNNING	3/3/2021 16:30	3/3/2021 16:30	370	CX482 S010	CX482 BASELINE ONE	370	13
3000	S010 MACHINE IS IDLE	2	MACHINE IDLE	3/3/2021 16:43	3/3/2021 16:43	371	CX482 S010	CX482 BASELINE ONE	371	0
3030	S010 MACHINE IS RUNNING	7	MACHINE RUNNING	3/3/2021 16:43	3/3/2021 16:43	372	CX482 S010	CX482 BASELINE ONE	372	40
3000	S010 MACHINE IS IDLE	2	MACHINE IDLE	3/3/2021 17:23	3/3/2021 17:23	373	CX482 S010	CX482 BASELINE ONE	373	9
3030	S010 MACHINE IS RUNNING	7	MACHINE RUNNING	3/3/2021 17:32	3/3/2021 17:32	374	CX482 S010	CX482 BASELINE ONE	374	18
549	+S011 ERROR FIXTURE 1 CYLINDER 17.3 NOT REVERSE	1	MACHINE ERRORS	3/3/2021 17:50	3/3/2021 17:50	375	CX482 S010	CX482 BASELINE ONE	375

[Jimmy801 · Accepted solution]

Hello @Anonymous 

if you need a solution in Power Query then you can add a custom column with this formula. You have to replace the "PreviousStep" with the name of your previous step. Be aware that i use your index column for referencing the "next" step. Here the formula

try Duration.TotalMinutes(Table.SelectRows(PreviousStep, (sel)=> sel[Index] = [Index]+1)[timestamp]{0} - [timestamp]) otherwise null

here a complete code example to understand it better

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("rZLRagIxEEV/ZdjXik5msju6b7qmNWCzkGixyP7/b5jYbbUSIbA+JJCTmcnhkvO5YmSsZlVAhfC57nbWGbAB/NE56z7ijcT1e3GjvOAFISlQTUuYBc0y7t1JLwnS9L/DZh3MPk3rnRnrhlkSwZyI3e5TFd1ZjOjfi5IFzapQYTUqTM6CH7P4AYJlIrFuchaas0BUoYJ6VRbPRKhQhKZmIS1xFggXKvBrspCWKQtEF4roq0it04d+i6UKjPe9h3d7Ohy9AQXdd2zYGh+HzxlcfwBvvowPqV/d+V37woNNjVkgdaFeXQ3DBQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [#"rror num" = _t, #"error text" = _t, #"category num" = _t, #"category text" = _t, timestamp = _t, #"time no millis" = _t, Index = _t, #"short name" = _t, #"Line Name" = _t, IndexAll = _t]),
    PreviousStep = Table.TransformColumnTypes(Source,{{"rror num", Int64.Type}, {"error text", type text}, {"category num", Int64.Type}, {"category text", type text}, {"timestamp", type datetime}, {"time no millis", type datetime}, {"Index", Int64.Type}, {"short name", type text}, {"Line Name", type text}, {"IndexAll", Int64.Type}}),
    #"Added Custom" = Table.AddColumn(PreviousStep, "Custom", each try Duration.TotalMinutes(Table.SelectRows(PreviousStep, (sel)=> sel[Index] = [Index]+1)[timestamp]{0} - [timestamp]) otherwise null)
in
    #"Added Custom"

output

Copy paste this code to the advanced editor in a new blank query to see how the solution works.

If this post helps or solves your problem, please mark it as solution (to help other users find useful content and to acknowledge the work of users that helped you)
Kudoes are nice too

Have fun

Jimmy

[Anonymous]

Jimmy: Thank you very much for the help

[PC2790]

Hey

Try using this DAX in your calculate column:

DifferenceColumn = var nextIndex = SampleTable[Index] + 1
var nextdate = CALCULATE(VALUES(SampleTable[timestamp]),FILTER(All(SampleTable),SampleTable[Index]=nextIndex))
return DATEDIFF(SampleTable[timestamp],nextdate,MINUTE)

It gives you the diiference column as expected:

Refer this thread for more ways to do it:

https://community.powerbi.com/t5/Desktop/Difference-between-two-rows/m-p/291588

Thanks