sql injection white paper

• MySQL SQL Injection - this white paper provides an excellent resource that covers PHP SQL injection with respect to MySQL specifically, but also covers other database technologies.
• Advanced SQL Injection In SQL Server Applications, by Chris Anley - an excellent, and extremely thorough, examination of SQL injection covering various platforms and technologies.
• OWASP - SQL Injection - OWASP's page about SQL injection which provides an excellent overview as well as further resources