Critique my MySQL Database Design for Unlimited DYNAMIC Fields

Question

Looking for a scalable, flexible and fast database design for \'Build your own form\' style website - e.g Wufoo.

Rules:

1. User has only 1 Form they can build

Answer 1

I agree with john owen.

dynamically creating a query from the schema is a small price to pay compared to querying EVA tables. Especially if the tables are large.

Usually table columns are considered an "interface". A design that relies on a dynamically changing interface is usually bad, but EAV data is a special case where you don't have many options. You have to choose between slow unintuitive queries or dynamic schema.