这样使得在关系数据库模型中导入外键更方便。
This makes importing foreign keys easier in relational database models.
YQL使用人们熟悉的表格与行的关系数据库模型。
YQL USES the familiar relational database model of tables and rows.
关系OLAP就利用了关系数据库模型。
这是将对象模型映射到关系数据库模型的一种典型框架。
This is typical of frameworks that map object models to relational database models.
关系数据库模型和SQL语言的使用必须考虑到企业级性能和可伸缩性。
The relational data model and use of the SQL language allows for enterprise level performance and scalability.
在关系数据库模型下，数据库的视图是由行和列组成的表的集合。
In the case of the relational database model, the conceptual view of the database is that of a collection of tables consisting of rows and columns.
采用关系数据库模型进行建模，对于同一关系框架上的数据定义了相似数据集。
A new definition of similar data set is proposed for some special data sets which have the same attributes in a relational database model.
您会发现Node - Arc - Node关系(三元组)比关系数据库模型更易于理解。
You may find Node-Arc-Node relationships (triple) easier to understand than relational database models.
给出了关系数据库模型的数学基本概念，如N元关系、N元有序组及N元有序组集合。
The paper introduced the basic conception of math of relation database model, N-ple relation, fordered N-ple and fordered sets.
该系统利用关系数据库模型存储设备的参数信息，构造邻接矩阵记录电网的拓扑结构。
In the system, Relation database model is adopted to memory the parameter information of the device, and the adjacent matrix is used to memory the network topology of power system.
SQLAzure的基础是关系数据库模型、提供了对约束、事务、临时表以及存储过程的完整支持。
SQL Azure is based on the relational database model, complete with constraints, transactions, temporary tables, and stored procedures.
然后在此基础上设计出系统的数据组织模式，建立了基于关系数据库模型的土地分类数据库。
Then, the author works out the model of the data's structure of this system and set up database of classifying land that based on the model of relational database.
在Initiatehub内部署的域模型并不能简单地1：1映射到一个关系数据库模型。
A deployed domain model in an Initiate hub is not simply mapped 1:1 onto a relational database model.
年代，E . F . Codd与其他一些人通过严格的数学工作创造了现在无处不在的关系数据库模型。
In the 1970s, the rigorous mathematical work of E. F. Codd and others created the now-ubiquitous relational database model.
本文提出了一种属性具有模糊度的模糊关系数据库模型，它可用来描述现实世界中范围广泛的模糊对象。
A fuzzy relational data model with fuzzy attributes, which could be used for truly modeling various fuzzy objects in the real world, is presented in the paper.
本文中提出一个支持符合事件、允许多种规则耦合模式的主动关系数据库模型，并给出相应的系统执行模型的描述。
In this paper, we propose a new relation active database model which can support complex event and multiple coupling model, and then give a description of its system execution model.
粗糙关系数据库模型从本质上来说就是多值信息系统，它继承和扩展了经典的粗糙集理论，但与经典粗糙集理论又有着很大的不同。
Rough relational database model is Multi-valued information system essentially, inheriting and extending classical rough sets theory. But there is much difference between them.
模型是一个关系数据库。
对于软件模型来说，这种表示方法非常合适，但是关系数据库采取的表示方法略有不同。
That's all fine and good for the software model, but relational databases take a slightly different approach.
我们使用访问XML文件服务和关系数据库的例子来进一步说明由SDO推动的编程模型的简单性。
We further illustrate the simplicity of the programming model promoted by SDOs with examples of access to an XML file service and to a relational database.
优秀的关系数据库人员和对象模型设计者可能具有相互竞争的目标，从而使得其各自的实现也具有很大的差异。
Good relational database practitioners and object model designers can have competing goals that make their respective implementations quite different from each other.
了解关系数据库、数据模型、惟一键、主键、外键和表联结。
Learn about relational databases, data models, unique keys, primary keys, foreign keys, and table joins.
模型需要匹配源XML或关系数据库中存在的类型、属性和关系，需要将此信息指定给DAS。
The model needs to match the types, properties, and relationships that exist in the source XML or relational database, and this information needs to be specified to the DAS.
即便是中等复杂程度的关系数据库，设计的东西也和对象模型不同。
When you start to get into even intermediate complexity in your relational database, you'll design things differently than you would with an object model.
Repository组件将存储模型映射到关系数据库模式和表。
The Repository component maps storage models to relational database schemas and tables.
Jena可以在文件系统中或在关系数据库中持久化它的模型。
Jena can persist its models on the filesystem, or in a relational database.
Hibernate和TopLink等工具大大简化了把对象模型映射到关系数据库模式的过程。
Tools such as Hibernate and TopLink have made it much easier to map an object model into a relational database schema.
与关系数据库相比，面向对象模型支持更丰富的关系
Richer relationships allowed by object orientation that aren't supported by relational databases
总之，种种约束限制了关系数据库系统的灵活性，并因此限制了系统用户在数据库内部实现复杂、交互式模型的能力。
Overall, these restrictions limit the flexibility of relational database systems and, thus, the ability of users of such systems to implement complex, interactive models within the database itself.
总之，种种约束限制了关系数据库系统的灵活性，并因此限制了系统用户在数据库内部实现复杂、交互式模型的能力。
Overall, these restrictions limit the flexibility of relational database systems and, thus, the ability of users of such systems to implement complex, interactive models within the database itself.
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