This paper discussses two very useful join methods of RDBS, joining in parallel and denormalize are analysed carefully,other useful methods for multiple table joins are discussed.

• 详细讨论了关系数据库连接的两种非常有效的处理方法，即连接的并行实现技术和连接非规范化方法，并对其它有效的连接技术进行分析和讨论.