In a hierarchical database hdbms , you begin with a strictly defined tree of data nodes 在层次数据库( hdbms )中,首先是从严格定义的数据节点树开始的。
But in dtds oriented more to data records , an xml document could be as rigid as a hierarchical database 但dtd更多地是面向数据记录, xml文档和层次数据库可以一样严格。
This goal is accomplished almost automatically in hierarchical databases , but takes work in relational ones 这个目标在层次数据库中几乎是自动完成的,但在关系数据库中需要做些工作。
In hierarchical databases , data access is utterly predictable in structure ; therefore both retrieval and updates can be highly optimized by a dbms 在层次数据库中,数据访问在结构上是完全可预测的;因此dbms可以高度优化检索和更新。
The ibm information management system is ibms premier transaction and hierarchical database management system , the product of choice for critical online operational applications and data where support for high availability , performance , capacity , integrity , and low cost are key factors Ims是ibm最早的事务和层次数据库管理系统,它非常适合支持高可用性、高性能、高容量、高完整性和低成本的关键性联机操作应用程序和数据。
Learn how the ibm information management system , ibms premier transaction and hierarchical database management system , is focusing on enterprise modernization through integration and open access with a service - oriented architecture available on demand Ibm信息管理系统( ibm information management system , ims )是ibm最早的事务和层次数据库管理系统。本文学习它如何通过利用一个随需应变、面向服务的体系架构来进行集成和开放访问从而达到企业的现代化。