How to Dynamically Filter Table B Based on Parameters in Table A Using DAX?

FilteredTableB =
VAR DistinctParameters = VALUES(TableA[parameter])
VAR FilterConditions =
ADDCOLUMNS(
DistinctParameters,
"Condition",
SWITCH(
TRUE(),
TableA[parameter] = "a", TableB[a] = TableA[value],
TableA[parameter] = "b", TableB[b] = TableA[value],
TableA[parameter] = "c", TableB[c] = TableA[value],
FALSE
)
)
VAR FilteredB =
FILTER(
TableB,
COUNTROWS(
FILTER(
FilterConditions,
[Condition]
)
) = COUNTROWS(DistinctParameters)
)
RETURN
FilteredB

DistinctParameters: This variable gets the unique parameters from Table A.

FilterConditions: This variable creates a table where each row contains a condition based on the parameter. For example, if the parameter is “a”, it checks if TableB[a] equals the value in Table A.

FilteredB: This variable filters Table B by applying the conditions. 

Let me know if that works.