SQL Sever 数据库是一个可扩展、高性能的关系数据库管理系统，广泛应用于B/S 模式的网站、C/S 模式的网络 应用程序。而数据安全问题一直以来是软件、网站关注的最为重要的问题，也是维系系统能够正常运转的因素之一。本文从 SQL Sever 数据库安全机制出发，对维护SQL Sever 数据库安全的目的、维护方式和方法、最终达到的效果等问题进行详细论 述。

SQL Sever database is a scalable, high-performance relational database management system, widely used in B / S mode site, C / S mode network applications. Data security has been the most important question for software and site, and also is one of the factors for the system to maintain normal operation. From the SQL Sever database security mechanisms, this paper discusses on purposes, ways, means and effect of maintaining the security of SQL Sever database.