The Relational database and the more recently Object Relational or Universal databases were the generic repositories within these organizations.
关系数据库和最近的对象关系或通用数据库是这些组织的一般存储库。
Relational databases that store XML data usually use Binary Large Object (BLOB) field types to store XML.
存储XML数据的关系数据库通常使用大型二进制对象(BLOB)字段类型存储XML。
The object relational mapping technology lets you map relational databases to objects.
对象—关系映射技术允许您将关系数据库映射为对象。
Persistence classes encapsulate access to your persistent stores, including relational databases, flat files, and object bases.
持久性类封装对持久性存储的访问，包括关系数据库、平面文件和对象库。
Another important difference between object databases and relational databases is that object databases store already assembled objects.
对象数据库和关系数据库之间的另一个重要区别在于，对象数据库存储已经组装好的对象。
This data access object is extremely simple; it does not connect to any external resources (such as relational databases) to obtain Test instances.
该数据访问对象极其简单；它不连接任何外部资源(比如关系数据库)以获得Test实例。
Richer relationships allowed by object orientation that aren't supported by relational databases
与关系数据库相比，面向对象模型支持更丰富的关系
For all these reasons, schema evolution is a very important topic that has been researched in the context of relational, object-oriented, and XML databases.
由于上述这些原因，模式演化作为一项重要课题需要在关系、面向对象和XML数据库环境中加以研究。
You can think of XMLBeans as an object-relational (or) mapper — but for XML files rather than relational databases.
可以将XMLBeans看作对象-关系(OR)映射器，但这是针对XML文件而非关系数据库而言的。
Not only are there different relational databases available, but you can also work with object repositories, document stores, and some very esoteric alternatives.
不仅有不同的关系数据库可用，而且你也可以与不同的对象存储库、文档存储、以及其它十分深奥的技术等进行工作。
NHMDB is a multimedia database system based on the extended relational data model and has the characteristics of object-oriented databases.
NHMDB是基于扩充关系数据模型的多媒介数据库系统，它以扩充关系为基础支持面向对象的主要特性。
In most cases, users don't care if their job is accomplished with hierarchical databases, relational databases, object-oriented databases, flat-file systems, or black magic.
大多数情况下，就用户而言，他们不关心我们的工作是使用层次数据库、关系数据库、面向对象数据库、平面文件系统，还是魔术来完成。
The persistence framework solves the problem of object persistence in relational databases. Object relational mapping is the core of persistence framework.
持久化框架较好地解决了关系型数据库的对象持久化问题，对象关系映射是持久化框架的核心内容。
The persistence framework solves the problem of object persistence in relational databases. Object relational mapping is the core of persistence framework.
持久化框架较好地解决了关系型数据库的对象持久化问题，对象关系映射是持久化框架的核心内容。
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