This question requires some hypothetical background. Let's consider an employee table that has columns name, date_of_birth, title, salary, using MySQL as the RDBMS. Since if any given person has th...

I am learning the Relational Model and data modeling. And I have some confusion in my mind regarding sub types. I know that data modeling is an iterative process and there are many different ways ...

I got a wtf problem that I can't figure out. I explain : I have a model named Product : var Product = Backbone.RelationalModel.extend( { urlRoot: Backbone.rootApiUrl + '/products', defaults: { i...

Does anyone know an application (Enterprise Architect, ...) that allows mapping from UML Class Model to Database Relational Model automatically? How? Thanks

I'm reading CJ Date's SQL and Relational Theory: How to Write Accurate SQL Code, and he makes the case that positional queries are bad — for example, this INSERT: INSERT INTO t VALUES (1, 2,...

Almost every table in every database I've seen in my 7 years of development experience has an auto-incrementing primary key. Why is this? If I have a table of U.S. states where each state whe...

Is there a generalized procedure or algorithm for transforming a SQL subquery into a join, or vice versa? That is, is there a set of typographic operations that can be applied to a syntactically co...