This site uses different types of cookies, including analytics and functional cookies (its own and from other sites). To change your cookie settings or find out more, click here. If you continue browsing our website, you accept these cookies.
The join multiple tool will do it in one fell swoop, but if for whatever reason you have to use the union tool, then you can put a summarize tool after it. You'd group on the ORG field and sum the other fields.