Political science

This post has two assignments; 1. Political science What is meant by the term national interest, and what are the dangers of using national interest as a rationale for nation-state behavior? 2. Four Steps To Finding The Revenue Hidden In Your Own Database 1. What is the difference between a JOIN and UNION statement? Provide an example of each (JOIN and UNION) using the same example data-set of your choice. 2. After reading chapter 1 and the article titled Four Steps To Finding The Revenue Hidden In Your Own Database from Doc Sharing, answer the discussion questions below. This article is a good demonstration of how a database and its information can be used in a business to impact other departments such as marketing. a. Give 2 specific examples on how data from a database could be used to make decisions in a Human Resources department. b.What type of information would they store in their database, give 2 examples of tables with 3 fields in each so that I know you understand the structure of a table and its fields.