Creating a table grouping and Ordering elements based in criteria - powerbi

Question

Hello Everyone I hope you guys are having a great day!Hello lovely people of SO
I have the following dataset:
PRODUCT
REGION
REP
REG-YH-67
NORTH
JANE
REG-YH-68
NORTH
JANE
REG-YH-77
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-30
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-14
WEST
ALEX
REG-YH-33
WEST
ALEX
REG-YH-16
WEST
WILL
REG-YH-16
WEST
WILL
REG-YH-53
WEST
WILL
REG-YH-13
OUT-OF-REG
WILL
REG-YH-42
OUT-OF-REG
MARTHA
REG-YH-67
OUT-OF-REG
MARTHA
REG-YH-68
NORTH
JANE
REG-YH-77
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-30
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-68
NORTH
JANE
REG-YH-77
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-30
NORTH
JANE
REG-YH-9
NORTH
JANE
REG-YH-13
OUT-OF-REG
JANE
REG-YH-42
OUT-OF-REG
JANE
I want to be able to GROUP by REGION and COUNT how many times a product was sold, but I want to be able to create a table that will show me the best top3 selling products by region, I know that first I have to group by REGION and COUNT but I want my final output to look like this:
REGION
1
2
3
NORTH
REG-YH-9
REG-YH-77
REG-YH-30
OUT-OF-REG
REG-YH-13
REG-YH-42
REG-YH-67
WEST
REG-YH-16
REG-YH-14
REG-YH-53
because these are the TOP 3 products by region and I want to be able to see the best selling product (COLUMN ONE) and the the REGION in the left-handside of the table, and also I want this table to be able to recalculate itself if I have a filter in the page that will filter the REP (sales representative) so that my table will update filtering REP--- I have tried day and night to do this guys but power bi isnt like python or R and its really coming for my mental health, so I WILL BE SO BEYOND THANKFUL if you guys can help me out please! I will be very attentive for responses all are welcome! but I am looking for DAX or code answers because I wanna learn, thank you thank you thank you so much

Answer 1

You have a number of tied rankings in your data, but seem to return them at random for your results.
The Power Query code below does the same.
To enter this code, from the Home tab select Transform data, then from the Power Query home tab, select Advanced Editor and paste the code below into the window that opens.
You will need to change the first statement to reflect your actual data source.
let
//Change next line to reflect actual data source
Source = Excel.CurrentWorkbook(){[Name="Table21"]}[Content],
#"Changed Type" = Table.TransformColumnTypes(Source,{{"PRODUCT", type text}, {"REGION", type text}, {"REP", type text}}),
//Group by REGION
//For each Region, Group again by Product and aggregate by count
// Then sort each table by the count
#"Grouped Rows" = Table.Group(#"Changed Type", {"REGION"}, {
{"PRODUCT", each Table.Sort(Table.Group(_,"PRODUCT",{
{"COUNT", each Table.RowCount(_), Int64.Type}
}), {"COUNT", Order.Descending})}
}),
//extract the top 3 into separate columns
#"Added Custom" = Table.AddColumn(#"Grouped Rows", "1", each [PRODUCT][PRODUCT]{0}, type text),
#"Added Custom1" = Table.AddColumn(#"Added Custom", "2", each [PRODUCT][PRODUCT]{1}, type text),
#"Added Custom2" = Table.AddColumn(#"Added Custom1", "3", each [PRODUCT][PRODUCT]{1}, type text),
#"Removed Columns" = Table.RemoveColumns(#"Added Custom2",{"PRODUCT"})
in
#"Removed Columns"
Results from your data