数据库访问组件odbc已经遭受到性能上的尴尬。
The database access, ODBC, has suffered from performance stigma.
正如前面提到的那样，EJB组件控制着对后台数据的访问，并管理着当前事务和数据库的内部锁定。
As mentioned previously, the EJB components control the access to the back-end data and manage the current transactions and database locking internally.
当一个EJB组件想访问数据库、消息队列服务器或者其它一些事务性资源时，它需要到资源管理器的连接(通常是使用JNDI)。
When an EJB component wants to access a database, a message queue server, or some other transactional resource, it acquires a connection to the resource manager (usually by using JNDI).
由于我们对两家银行使用了相同的组件实现，因此我们访问的是相同的基础数据库模式。
Since we are using the same component implementation for both banks we are accessing the same underlying data base schema.
EJB组件控制着对后台数据的访问，并管理着当前事务以及数据库的内部锁定。
The EJB components control the access to the back-end data and manage the current transactions and database locking internally.
最后，当用户尝试访问EJB组件时，就会运行为特定数据库而部署的代码。
Finally, when someone attempts to access the Entity EJB components, the code deployed for the given database will then be run.
在图1中，我们看到一个servlet和多个EJB组件在单个事务的上下文中访问一个数据库。
In Figure 1, we see a servlet and multiple EJB components access a database within the context of a single transaction.
在本文中，您将亲历安装和配置用Perl访问Derby数据库所需的各种组件的每一个步骤。
Throughout this article you build upon each step of installing and configuring the components involved in accessing a Derby database from Perl.
当WebSphereProcessServer上的组件（如资源适配器）需要访问数据库时，它将使用服务器数据源。
When a component such as a resource adapter on WebSphere Process Server needs database access, it uses a server data source.
不同版本的J2EE应用程序组件(例如访问相同外部数据库的实体bean)在修改相同的数据表或数据记录的时候会存在同步问题。
Multiple versions of J2EE application components, such as entity beans that access the same external database, could have synchronization issues while modifying the same table or row.
若要包装Zero组件以供其他开发人员重用，需要考虑的事情很多，而其中大多数问题都是由数据库访问引起的。
There are a number of issues to consider when it comes to packaging a Zero component for reuse by other developers, and database access is the cause of many of them.
这个平台中包括多个编辑器、图形编辑器、特性(nature)、构建器、一个WebService向导、一些数据库访问和查询工具和其他一些组件。
Included in this platform are multiple editors, graphical editors, natures, builders, a Web Service wizard, database access and query tools, and other components.
在本文中，我们使用了Delphi 2005中的DataSync和DataHub组件来展示如何使用Borland DataProvider对DB 2UDB数据库表的数据进行访问。
In this article, we've used the new DataSync and DataHub components in Delphi 2005 to demonstrate data access on DB2 UDB database tables using the Borland data Provider.
因此，为了运行访问DB2数据库的perl脚本，需要在系统上安装以下组件。
So, in the order to run a Perl script that has access to your DB2 database, you need the following components on your system.
Django提供了自己的对象关系型数据映射组件(object - relationalmapper,orm)库，它可以通过Python对象接口支持动态数据库访问。
Django comes with its own object-relational mapper (ORM) library that supports dynamic database access through a Python object interface.
一般应用很可能包含许多其他组件(数据库访问，E - Mail协议，或者甚至于是像HL7或SAP这样非常专业的协议)。
A typical application would likely have many other components (database access, E-mail protocols, or even very specialized protocols like HL7 or SAP.)
实体e JB组件的主要目的是远程访问持续数据，这些数据主要存储在关系数据库中。
The main purpose of entity EJB components is to remotely access persisted data, mostly stored in a relational database.
信息服务支持组件提供的功能还可以帮助将服务接口映射为访问整合数据库中的数据的查询。
Functionality of the information service enablement component can also help to map a service interface to a query that accesses the data in the consolidated database.
其他组件包括一个作为联邦数据库的数据库，一个或多个数据源，以及访问数据库和数据源的一些客户端(用户和应用程序)。
Other components include a database that ACTS as the federated database, one or more data sources, and clients (users and applications) that access the database and data sources.
数据库经常由组件和对象访问，而组件和对象又由另一层代码调用，这一层通常就是所谓的中间层。
The database is often accessed by components or objects that execute on the server and are called by other layers of code, often referred to as the middle tier.
如果不允许用户访问包含组件的数据库，那么可以允许他访问含有该组件的页面，但同时又不能访问数据库。
If a user is not permitted to access a database that contains a component, allowing the user to access a page with that component does not give him or her access to that database.
每个组件都获得到数据库的Connection；很可能每个组件都在访问同一个数据库。
Each obtains a Connection to the database; it may well be the case that each is accessing the exact same database.
文中讨论了J2EE在组件开发、数据库访问、负载平衡与多线程等多项关键技术在建立分布、动态、实际问题的应用。
Several key techniques based on J2EE, including the component development, database access, load balance and multithreading, is discussed for building a distributed and dynamic application system.
把其中的数据访问组件设计成自定义标签库，方便了访问数据库的代码编写和维护。
Designing the database-access component in user-defined Tag Library to make it is easy to code and maintain program which need to access and operation database.
完成所分配模块和组件的设计，编码实现和单元测试，包括用户界面，功能逻辑，数据库访问和各种应用集成。
Design, implement and unit test the assigned components, modules and projects, including the necessary user interface, business functionality, database access and application integration.
按照J2EE体系结构要求，以建立相应EJ b组件实现数据库访问逻辑和业务逻辑。
According to the requirement of J2EE system structure, corresponding EJB component was established to access database and handle operation logic.
针对不可靠军事通信应用系统中网络数据库访问效率低的问题，提出一种基于分布式组件的数据库访问模型。
According to low efficiency in network database accessing in unreliable military communication system, this paper proposes the database access model based on distributed component.
该系统采用了ASP技术与ado组件结合连接、访问数据库的方法，并针对企业内部的实际需要，提出了具体的解决方案并予以实现。
ASP and ado technology are adopted in this system to connect and access database. Based on the actual situation in the company, the concrete solution of the system is proposed and realized.
该系统采用了ASP技术与ado组件结合连接、访问数据库的方法，并针对企业内部的实际需要，提出了具体的解决方案并予以实现。
ASP and ado technology are adopted in this system to connect and access database. Based on the actual situation in the company, the concrete solution of the system is proposed and realized.
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