TIme Interval Calculation

[jerryr125]

Hi - I am looking to determine the time interview between records per LocationCode and Date

Example Data:

LocationCode	Date-Time-Stamp
1234-24	4/24/2025 10:00 am
1234-24	4/24/2025 11:00 am
1234-25	4/25/2025 1:00 pm
1234-25	4/25/2025 3:00 pm
4567-24	4/24/2025 10:00am
4567-24	4/24/2025 10:45 am
4567-24	4/24/2025 2:00 pm
4567-25	4/25/2025 8:00am
4567-25	4/25/2025 9:00am

Output:

LocationCode	Date-Time-Stamp	TimeInterval-Minutes
1234-24	4/24/2025 10:00 am
1234-24	4/24/2025 11:00 am	60
1234-25	4/25/2025 1:00 pm
1234-25	4/25/2025 3:00 pm	120
4567-24	4/24/2025 10:00am
4567-24	4/24/2025 10:45 am	45
4567-24	4:24/2025 2:00 pm	195
4567-25	4/25/2025 8:00am
4567-25	4/25/2025 9:00am	60

Any ideas ? Jerry

[v-csrikanth]

Hi @jerryr125 

I wanted to follow up since I haven't heard from you in a while. Have you had a chance to try the suggested solutions?
If your issue is resolved, please consider marking the post as solved. However, if you're still facing challenges, feel free to share the details, and we'll be happy to assist you further.
Looking forward to your response!

Best Regards,
Community Support Team _ C Srikanth.

[v-csrikanth]

Hi @jerryr125 

We haven't heard from you since last response and just wanted to check whether the solution provided has worked for you. If yes, please Accept as Solution to help others benefit in the community.

If the above information is helpful, please give us Kudos and mark the response as Accepted as solution.
Best Regards,
Community Support Team _ C Srikanth.

[v-csrikanth]

Hi @jerryr125 

Thank you for being part of the Microsoft Fabric Community.

As highlighted by @ronrsnfld, the proposed approach appears to effectively address your requirements. Could you please confirm if your issue has been resolved?
If you are still facing any challenges, kindly provide further details, and we will be happy to assist you.

Best Regards,
Cheri Srikanth

[ronrsnfld]

Here's one way:

  (Paste the code below into the Advanced Editor and explore the Applied Steps to understand.

   Then adapt to your actual data)

• Group by LocationCode
• Sort the subgroups (might not be necessary)
• Add an Index column to each subgroup to enable 
  
  • Subtract each time stamp from the next one, UNLESS it is the first (Index = 0)
• Expand the subtable

let
    Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMjQyNtE1MlHSUTLRNwIiAyNTBUMDKwMDhcRcpVgdHAoMMRSYQhSYQhWA5AtwyxsjyZuYmpljdUEiXnkTUwU8CowwLEB1gAW6+ajSllDpWAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [LocationCode = _t, #"Date-Time-Stamp" = _t]),
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"LocationCode", type text}, {"Date-Time-Stamp", type datetime}}),
    #"Grouped Rows" = Table.Group(#"Changed Type", {"LocationCode"}, {
        {"Intervals", (t)=>
            [a=Table.Sort(t, each [#"Date-Time-Stamp"]), //Sort may not be necessary
             b=Table.AddIndexColumn(a,"Index",0,1,Int64.Type),
             c=Table.AddColumn(b,"TimeInterval-Minutes", each 
                    if [Index] = 0 then null else Duration.TotalMinutes([#"Date-Time-Stamp"] - b[#"Date-Time-Stamp"]{[Index]-1})  )
            ][c], 
        type table [LocationCode=nullable text, #"Date-Time-Stamp"=nullable datetime, #"TimeInterval-Minutes"=Int64.Type]}}),
    
    #"Expanded Intervals" = Table.ExpandTableColumn(#"Grouped Rows", "Intervals",
                                {"Date-Time-Stamp", "TimeInterval-Minutes"})
in
    #"Expanded Intervals"

Source

Results