Routines, Procedures, Functions and Methods (Mysql/SQL): What they are, and what they do

As IBM lost 25% of it's value in the past few weeks, I found a very valuable article on their website clearing the semantic mess in my head. The chart is top-notch:
http://publib.boulder.ibm.com/infocenter/db2luw/v8/index.jsp?topic=/com.ibm.db2.udb.doc/ad/c0009145.htm