how to avoid aggregation to two table when there are no relationship

[oakgogo]

the two table has no relationship, and I want to make the calculation return blank when look at "column" dimension, how to write the dax? thank you.

here is the two tables:

here is the dax and result, I want the sum calculation do not show when unrelated table is there：

CAL=calculation(sum(table[value]))

[Dangar332]

hi, @oakgogo 

try below

measure = 
 if( 
    iscrossfiltered(firsttable),
    sum(table[value]),
    blank()
 )