Need help to update existing column

siumui 

You will need to create a new table (under "Modeling" in the ribbon, "New Table") for the samples using:

Sample Table = 
    SAMPLE(5, Cash, 0)

 The create the following measure:

Yes = 
IF(
    COUNTROWS(
        INTERSECT('Sample Table', 'Cash')) = 1, 
        "Yes", "No")

and you will get this:

siumui 

You must be aware that when you create new tables, these are loaded when the whole model is loaded; they are not created "over time".

So you can just directly create one single table with 6 random rows. If there is a specific reason for creating them separately (given that they will be created simultaneaously when the model is loaded), then you can create a new table for one row and use UNION to append them.