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Hey guys!
I want the column of a "subquery" to be equal to the column of the current table.
Sample:
= Table.AddColumn( NbrMonth, "NmbCustomer", each Table.RowCount( Table.SelectRows( Table.Distinct( Table.SelectColumns( NbrMonth,{"Store","Op", "NF"} ) ), each ([NF] = [NF]) //I want the [NF] column of this "subquery" to be equal to [NF] of the NbrMonth table. ) )
Solved! Go to Solution.
This should do the trick:
= Table.AddColumn( NbrMonth, "NmbCustomer", each let OuterNF = [NF] in Table.RowCount( Table.SelectRows( Table.Distinct( Table.SelectColumns( NbrMonth,{"Store","Op", "NF"} ) ), each ([NF] = OuterNF) ) ) )
Regards,
Owen
Glad it worked 🙂
Sure - a "let expression" is used to capture values from intermediate calculations before returning a result.
It takes the form
let variable1 = expression1, variable2 = expression2, ... in result_expression
In your example, I used let OuterNF = [NF] to store the value of [NF] from the current row so that I could refer to it in the result expression. The resulting "let expression" formatted a little differently was:
let OuterNF = [NF] in Table.RowCount( Table.SelectRows( Table.Distinct( Table.SelectColumns( NbrMonth,{"Store","Op", "NF"} ) ), each ([NF] = OuterNF) ) )
Here is a link to the Power Query M language specification which might be useful for reference - see page 85 for let expressions:
https://msdn.microsoft.com/en-us/query-bi/m/power-query-m-language-specification
Best regards,
Owen
This should do the trick:
= Table.AddColumn( NbrMonth, "NmbCustomer", each let OuterNF = [NF] in Table.RowCount( Table.SelectRows( Table.Distinct( Table.SelectColumns( NbrMonth,{"Store","Op", "NF"} ) ), each ([NF] = OuterNF) ) ) )
Regards,
Owen
Glad it worked 🙂
Sure - a "let expression" is used to capture values from intermediate calculations before returning a result.
It takes the form
let variable1 = expression1, variable2 = expression2, ... in result_expression
In your example, I used let OuterNF = [NF] to store the value of [NF] from the current row so that I could refer to it in the result expression. The resulting "let expression" formatted a little differently was:
let OuterNF = [NF] in Table.RowCount( Table.SelectRows( Table.Distinct( Table.SelectColumns( NbrMonth,{"Store","Op", "NF"} ) ), each ([NF] = OuterNF) ) )
Here is a link to the Power Query M language specification which might be useful for reference - see page 85 for let expressions:
https://msdn.microsoft.com/en-us/query-bi/m/power-query-m-language-specification
Best regards,
Owen
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