Dynamic Dropdowns is not the extension to use for creating a search and results page to query the database.
To create a search page that will query the database, and display the results of that search, you need to use DataAssist
with data assist, you can run the data assist wizard to create the search and results page based on your table.
Dynamic Dropdowns is used for creating a list that filter related data.
A good example is a car site.
in the parent list, you would select the make of car: Ford, Toyota, Subaru, Nissan etc.. When you make a selection in the parent list, it will populate the child list models for the selected make. Choose Subaru and the child list is populated with Forester, Outback, Tribecca. Choose nisan, and the child list is populated with Sentra, Maxima, Quest etc.. This is not the correct tool to be using.