====== Introduction to Database Management Systems with PostgreSQL ======

**Many-to-many**
Solution: additional table with both Keys. 

**Hierarchy**

**Recursive relationships**

===== Exercise 1 - Import data into PostgreSQL =====

===== Exercise 2 - Insert statement =====

===== Exercise 3 - Select statement =====

===== Exercise 4 - More advanced queries =====

===== Exercise 5 - Functions =====

[[http://www.postgresql.org/docs/9.1/interactive/functions-math.html| Click here of a list of mathematical functions and operators]]


===== Exercise 5 - Dealing with multiple tables =====