powerbi directquery distinct count group by issue - powerbi

Question

I have a table format with
record date(including seconds), user ID, Database
I need to show the maximum distinct number of users per hour grouped by every 5 minutes ( not sure if this explains - please see example below)
I am only using DirectQuery storage and not intended to change that to import as well.
I have tried various methods but could not manage without changing the storage mode. Any help is appreciated.
My table sample is,
21/01/2019 12:35:00, jane, UK
21/01/2019 12:35:00, joe, UK
21/01/2019 12:35:00, joe, NL
21/01/2019 12:40:00, bob, NL
21/01/2019 12:40:00, jane, NL
21/01/2019 12:40:00, joe, NL
21/01/2019 12:40:00, jakob, NL
Expected result
21/01/2019 12, UK, 2
21/01/2019 12, NL, 4

Answer 1

Start by adding an hour column in the data table.
Hour = HOUR([DateTime])
Then create a temporary summarized table (this table can be hidden from the report view).
SummTemp =
SUMMARIZE(
Data;
[Datetime];
[Nat];
[Hour]; // this is the calculated column with only hour.
"Date"; DATE(YEAR([DateTime]); MONTH([DateTime]); DAY([DateTime]));
"Count"; COUNTA('Data'[Nat])
)
Then create a second summarized table:
SummaryTable =
SELECTCOLUMNS(
SUMMARIZE(
SummTemp;
[Date];
[Hour];
[Nat];
"MaxCount"; MAX('SummTemp'[Count]);
"NewName"; [Date]&" "&[Hour]
// OR "NewName"; ( [Date]&" "&TIME([Hour]; 0; 0))*
);
"DateHour"; [NewName];
"Nationality"; [Nat];
"MaxCNX"; [MaxCount]
)
The end result will look like this:
*If you use this line, then you will get a column in text format but with [dd/mm/yyyy hh:00:00]. You can convert this column to a datetieme format by selecting it and change it from text to datetime via Modeling->Data type. NMot sure if you can drop both minutes and seconds from it but you can drop seconds so that your DateHour column will have a format like: [dd/mm/yyyy hh:00]