可能的原因是业务需求或特性功能发生了变化，因此也要求更改数据库架构。
There might be changes in business requirements or feature functionality that require changes to the database schema as well.
这种方法不但能够降低网络开销，而且在EJB内部通过为整个业务功能创建一个事务环境也可以大大地减少对数据库的访问次数。
Not only will this reduce network overhead, but within EJBs, it also critically reduces the number of database calls by creating a single transaction context for the entire business function.
我们在开始时提到的优点之一是，可以使用数据库功能搜索业务数据。
One of the advantages we discussed at the beginning is the ability to leverage database functionality to search for business data.
注意：我们对此情景的假设是业务数据已经是xml格式的，尽管数据库可能没有任何XML功能。
Note: an assumption we are making for this scenario is that the business data is already in XML, even if the database might not have any XML capabilities.
使用XQuery的此功能，不仅可以推出业务逻辑，而且可以发布到数据库服务器，从而有效地使中间层应用程序非常简单。
This feature of the XQuery makes it possible to push not only the business logic but also the publishing to the database server, in effect making the middle tier application very simple and thin.
业务对象是存放应用程序数据的容器，这些数据用于表示业务功能或元素，比如数据库表或SQL查询的结果。
Business objects are containers for application data that represent business functions or elements, such as a database table or the result of an SQL query.
所有这些功能共同允许您通过调整数据库来配合业务环境，而不是牺牲您的设计来适应数据库。
All these features allow you to adapt the database to your business environment instead of compromising your design to fit the database.
它们还包含了对象的概念，并且可以扩展数据库服务器的功能，更好地配合您的业务模型。
They also include object concepts and the capabilities to extend the database server capabilities to better fit your business model.
非功能需求在需求数据库中进行描述，依附于业务过程模型中的任务或项。
Non-functional requirements are described in a requirements database, attached to tasks and items in the business process model.
不同的数据库结构、技术和业务需求具有不同的通用功能，可以把这些功能转移到泛型DAO的通用代码中。
Different database structures, technologies, and business requirements have different common functionality that can be moved into the common code of a generic DAO.
尽可能的把数据库仅作为一个在线存储的功能而使用，不要把业务逻辑放在数据库里，否则将来会非常难扩展；
Remove all business logic from the database such as stored procedures and move it into the application.
本文详细介绍了系统的设计过程，主要包括：系统总体规划，数据库设计，功能模块的设计及业务流程。
The paper introduced the course of system designing in detail, include principally: system collectivity layout, database designing, function module designing and operation flow.
在此基础上，给出个人多媒体移动业务管理模型原型系统，分析了系统中每个模块的功能以及系统中数据库的构造和关系。
Then it gives a management model for multimedia personal mobile service and analyzes functions of the model and database structure in the model.
本文分析了港口生产调度系统的业务过程，从数据库设计、系统功能、系统界面等方面提出了系统的逻辑设计方案。
This paper analyzes the business flow of the port scheduling system and presents the logical design in database, system function and system interface.
在分析了系统业务和功能之后，设计了系统数据库的E - R模型及逻辑数据库模型。
After the analysis of system function and business, this paper designs the database E-R model and logical data model of this system.
论文重点分析了呼叫中心业务处理流程的业务需求，对系统的体系结构设计、功能设计，以及数据库设计进行了详细的论述和说明。
The system architecture design, functional design, interface design, and database design are discussed in details and description. This software system developed into a trial in Yunnan Post Company.
包括子功能模块设计、业务流程设计、数据流程设计、数据库设计。
Including sub-function module design, business process design, data flow design, database design.
然后，详细分析了面向业务流程的土地利用规划管理系统的数据库设计和功能模块设计，实现面向业务流程的土地利用规划管理系统。
Then database design and functional modules design of the solution are analyzed in detail, and business process oriented land-use planning management system is implemented.
然后，详细分析了面向业务流程的土地利用规划管理系统的数据库设计和功能模块设计，实现面向业务流程的土地利用规划管理系统。
Then database design and functional modules design of the solution are analyzed in detail, and business process oriented land-use planning management system is implemented.
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