Thanks for your reply, but is exist another solution to do that? In fact, I want that if the id of portfolio are different or if the value are different, "UPDATED" should be displayed.... I do not know another solution for doing that.
If I add the title or the id of the portfolio in the overview table, The "dim_updated Legal Reference" column and the "dim_updated Contact" column have not anymore the correct values and it's really a problem....
And I obtain now multiple rows (one for each portfolio). Besides I have the intention to do the same with other linked data (for instance "activities" with the same logic that portfolio). And if i use this solution I'm obliged to add the activity title, And I have a lot of multiple rows (I lose the meaning of overview table)