This classification matters the evolution of SQL injection attacks up to 2010. Here is no refernce to new attacks on WebSQl etc. It ist meant as attachment to my B.Sc. thesis from 2010. The thesis is presented to the Department of Electrical Engineering and Information Sciences of the Ruhr-University of Bochum Chair of Network and Data Security of the Ruhr-University of Bochum, Horst-Görtz Institute, Prof. Jörg Schwenk