How can I save a value to another column but only if it has changed and is not null?

Hi all. Im using get part of url to filter my collection using query parameters. The only issue is that the query parameters will disappear when I change views, but I want to save that value to the user. So how can I save the query parameter value and only change it in the user table if the value changes and is not null (in other words only if there is a new query parameter value that isnt null)?

You’ll need a custom action with a Set Column action and a condition on that custom action that will only set the column value when the value does not match and is not empty.

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