GreenSQL is a Database Security solution.

GreenSQL is an Open Source database firewall used to protect databases from SQL injection attacks. GreenSQL works as a proxy and has built in support for MySQL and PostgreSQL. The logic is based on evaluation of SQL commands using a risk scoring matrix as well as blocking known db administrative commands (DROP, CREATE, etc). Commercial version of GreenSQL supporting Microsoft SQL Server, MySQL and PostgreSQL, The GreenSQL Express version is available for FREE at GreenSQL.com database security solutions.

via   | Open Source SQL Database Security, SQL Injection Prevention.