So you have two data types? One as Industry and one as Business?

For the Business Data type, provide it an industry data field.

Then on your first dropdown, your data source would be “Do a Search for Industries”
On your second dropdown, your data source would be “Do a Search for Businesses” except you’d have a constraint on the search where Industry = dropdown Industries value (The Industry dropdown).

Hope that helps…

Tal
Learn Bubble @ Nocodify