Days between dates row by row - Power query or DAX?

[cottrera]

Hi 

I have a table withproperty ref, Job number, Job description, Supplier, Date logged. We have suppliers who carry out repairs at individual properties. Sometimes they will carry out more than one repair at the same property over time.

I would like either a power query solution or DAX function that check the property reference , job desctiption and supplier name.

If these appear more than once I would like to calculate the number of days from when the job was previously logged. Row by Row.

Some properties will have up to 10 jobs logged agains them. In this example there are 2 properties each one has a the same supplier who carried out 4 repairs. The last column is the result that I would expect

The example below is a snapshot of the table  

Property Ref	Job#	Job Description	Supplier Name	Date Logged	Days between last Date Logged
186173	6909694	Electrical Heater	ACME	23/03/2021	1st Job
186173	7054670	Electrical Heater	ACME	08/06/2021	77
186173	7085419	Electrical Heater	ACME	25/06/2021	17
186173	7134547	Electrical Heater	ACME	20/07/2021	25
80218	6779047	Roof Repair	GFS Roofers	19/01/2021	1st Job
80218	6929155	Roof Repair	GFS Roofers	06/04/2021	77
80218	6960307	Roof Repair	GFS Roofers	22/04/2021	16
80218	7156921	Roof Repair	GFS Roofers	28/07/2021	97

thank you 

Richard

[cottrera]

Thank you works fine 😀

[amitchandak · Accepted solution]

@cottrera , Try a new column like

New column =

var _max = maxx(filter(Table, [Property Ref] = earlier([Property Ref]) && [Date Logged] < earlier( [Date Logged] ) ),[ [Date Logged] )
return
datediff([Date Logged],_max, day)