Trre/Drop Down quick app for testing database tbls

Hi. I've got a few tbls that I'm testing. I'd like to have a simple web app to be able to iterate through the tbls to test out what I have in them. I'd like to be able to have each tbl as a drop-down/select box, so I select from selecta, which lists items from TBL-A, which then uses the id from TBL-A, to get the items from TBL-B that matches. Selecting from drop-down for TBL-B, then gets me the list on TBL-C... I've got 3-4 tbls that are linked by their id. Rather than reinvent the wheel, I'm asking if anyone has a quick app that they can point to that I can extract/modify the functionality for my needs... thanks