Open the transform menu
To subtract from two tables, click the gear icon at the top right corner of the page and select “Transform” from the dropdown menu.
A Popup window will appear. Select “Subtract” and click Next. Then, Select the table that you will subtracting from in “Select Top Table” and the table with values that you want to subtract in “Select Bottom Table.”
In “Select Key Column” select the column that will decide if the rows are the same.
After clicking Start, the Top Table will now only have values that are not included in the Bottom Table.