Counting customers that have sales in the same products - dax

Question

The data table has customers, products sales etc.
Based on a slicer selection products i want to count how many customers have sales in all selected products.
As below i only want to count customer B because he is the only one having all selected products
Customer a Product a product b product c
A. 1 1
B. 1 1 1
C. 1
D. 1 1
E. 1 1

Answer 1

OKay. I think Your table is this:
Then You need this dax code:
CustomerHavingAll3Products =
VAR Onlya =
CALCULATETABLE ( VALUES ( 'Product'[Customer] ), 'Product'[Product a] <> 0 )
VAR Onlyb =
CALCULATETABLE ( VALUES ( 'Product'[Customer] ), 'Product'[Product b] <> 0 )
VAR Onlyc =
CALCULATETABLE ( VALUES ( 'Product'[Customer] ), 'Product'[Product c] <> 0 )
VAR CombinedAll =
INTERSECT ( INTERSECT ( Onlya, Onlyb ), Onlyc )
RETURN
COUNTX ( CombinedAll, [Customer] )
If we test it on a table visual:
Please do not forget to click the down-pointing arrow on customer column on the filter pane, and ensure that "show items with no data" is checked, see the picture below

Answer 2

you can do it on power query side... totally dynamic...
let
Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WclTSUTIEYjAVqxOt5AQVMISLOMOkgRSI74KuxRVJi1JsLAA=", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [Customer = _t, #"Product a" = _t, #"product b" = _t, #"product c" = _t]),
#"Changed Type" = Table.TransformColumnTypes(Source,{{"Customer", type text}, {"Product a", Int64.Type}, {"product b", Int64.Type}, {"product c", Int64.Type}}),
count_columns = Table.ColumnCount(Source)-1,
#"Unpivoted Columns" = Table.UnpivotOtherColumns(#"Changed Type", {"Customer"}, "Attribute", "Value"),
#"Grouped Rows" = Table.Group(#"Unpivoted Columns", {"Customer"}, {{"Total Count", each Table.RowCount(_), Int64.Type}}),
#"Filtered Rows" = Table.SelectRows(#"Grouped Rows", each [Total Count] = count_columns )
in
#"Filtered Rows"