Transform 15 mins interval data into 30 mins data.

[siva3012]

Hi, 

        I want to convert the 15 mins interval data into 30 mins interval data. Can anyone guide me in doing this in PowerBI?  

I have the screenshot which is required. 

[Anonymous]

Hi @MarcelBeug 

I appreciated this is an old thread, I am trying to apply your methodology in rounding time values to the nearest 8 hour interval. I am somewhat struggling to understand the functions within the below and how to amend this to achieve it. For example, It would be ideal if times between 00:00:00 - 07:59:59 were assigned to the 00:00:00 band, those between 08:00:00 - 15:59:59 in the 08:00:00 band and those 16:00:00 - 23:59:59 to the 16:00:00 band. 

For a different purpose, it would also be good for you to explain the calculation given within the first solution, so it could be modified to for example rounding to 1 hour, or 10 minute timeframes. 

Your response is appreciated. 

Regards,

[MarcelBeug · Accepted solution]

A Power Query solution:

let
    Source = Data15Mins,
    #"Changed Type" = Table.TransformColumnTypes(Source,{{"Time", type number}}),
    #"Divided Column" = Table.TransformColumns(#"Changed Type", {{"Time", each Number.RoundDown(_ * 48, 0) / 48, type number}}),
    #"Changed Type1" = Table.TransformColumnTypes(#"Divided Column",{{"Time", type time}}),
    #"Inserted Merged Date and Time" = Table.AddColumn(#"Changed Type1", "Merged", each [Date] & [Time], type datetime),
    #"Grouped Rows" = Table.Group(#"Inserted Merged Date and Time", {"Merged"}, {{"Usage", each List.Sum([Usage]), type number}}),
    #"Inserted Time" = Table.AddColumn(#"Grouped Rows", "Time", each DateTime.Time([Merged]), type time),
    #"Extracted Date" = Table.TransformColumns(#"Inserted Time",{{"Merged", DateTime.Date}}),
    #"Reordered Columns" = Table.ReorderColumns(#"Extracted Date",{"Merged", "Time", "Usage"})
in
    #"Reordered Columns"