GreenSQL是一个开源的数据库防火墙（Database firewall），用来保护数据库免受SQL注入攻击。GreenSQL作为一个SQL命令代理来工作，并且内置对于MySQL的支持。其工作原理是基于SQL命令的评估，采用风险评分矩阵的模式进行工作，阻止已知的DBA命令（DROP、CREATE等等）。GreenSQL基于GPL协议进行分发。-GreenSQL is an open source database firewall (Database firewall), used to protect databases from SQL injection attacks. GreenSQL SQL command as a proxy to work, and built-in support for MySQL. Its working principle is based on the assessment of SQL commands using risk score matrix model to work, to prevent known DBA commands (DROP, CREATE, etc.). GreenSQL distribution agreement based on GPL.