DAX that looks up value from another table2 and return data where date in table2 <= date in table1

[ouma]

Hello Guy

This problem seems simple but been stuck with it for a bit. I have two table call it Table1 and Table2. I want to create a calculated column in Table1 that picks the exchange rate from table2 where;

1. The dates in Table1 and Table2 Match

2. If there is not date match in the two tables the return the closest earlier date match. I have attached the two tables and the results I would like to achieve with the new calculated column

Looking forward to your assistance, thanks

What is would like to achieve in the new calculated column

[amitchandak · Accepted solution]

@ouma , Try like

new column in table 1
=
var _date = maxx(filter(Table2, table2[Date] <= table1[Date]), Table2[Date])
return
maxx(filter(Table2, table2[Date] <=_date), Table1[Exchange Rate])

[amitchandak · Accepted solution]

@ouma , Try like

new column in table 1
=
var _date = maxx(filter(Table2, table2[Date] <= table1[Date]), Table2[Date])
return
maxx(filter(Table2, table2[Date] <=_date), Table1[Exchange Rate])

[ouma · Accepted solution]

Thanks Amitchandak for your quick response. Your DAX helped me a lot, I improved it as below and it worked

VAR _date =

        TOPN (

            1,

            FILTER (

               Table2, table2[Date] <= table1[Date]

            ),

            table2[Date],

            DESC

        )

    RETURN

        MAXX (

                _maxDate,

                Table1[Exchange Rate]

        )