Exception Handling in MySQL

To handle exceptions in mysql visit the following links

http://www.devshed.com/c/a/MySQL/Error-Handling-Examples/
http://www.devshed.com/c/a/MySQL/Error-Handling-Examples/2/

http://dev.mysql.com/doc/refman/5.0/en/declare-handler.html

To raise an error in mysql visit the following links

http://forums.mysql.com/read.php?99,55108,131867#msg-131867
http://forums.mysql.com/read.php?99,55108,72394#msg-72394

Start with and connect by in oracle

http://www.adp-gmbh.ch/ora/sql/connect_by.html