Hi Federico A Galban,
There is no straight forward approach for this scenario in graphical calculation view. But you can do this with some work around.
- Join both the tables using join node, consider Table 1 as left table and Table 2 as right table and make the join type as Left Outer Join
- Put one projection node above that join node and write a filter expression to filter only NULL values from Table2.Account column, so that you can achieve what you need.
Hope this helps you,
Regards,
HarikrishnanS