Also, performing all CMP operations in a session bean shields the Web application from having to know any of the implementation details of the database access layer.
此外，在Sessionbean中执行所有CMP操作使得Web应用程序无需知道数据库访问层的任何实现细节。
For quick prototyping efforts it is acceptable to combine the database access in the view layer, compromising the strict separation of data from view.
为了快速开发原型，将数据库访问合并到视图层，打破数据与视图严格分离的限制，这是可以接受的。
If access to the source database is unreliable, striving for resiliency in the cache layer might improve overall stability for read-intensive applications.
如果对源数据库的访问不可靠，在缓存层争取弹性可能会提高读密集型应用程序的总体稳定性。
Finally, the data access layer is a persistent data store, such as a database or file storage.
最后，数据访问层是持久化的数据存储，比如数据库或文件存储。
The data access layer provides a semantic data store, a user profile, and the rules database.
数据访问层提供了一种语义数据存储、一个用户个人文件以及规则数据库。
The Business Layer does not have any direct communication with the database - this is all handled by the Data Access Layer.
业务层和数据库没有任何通讯-这些有数据访问层处理。
PHP's database accesses are done using PEAR: : DB, a handy database abstraction layer that allows the same database-access code to be used regardless of what database is implemented.
PHP的数据库访问是使用PEAR：DB完成的，这是一个方便的数据库抽象层，不管数据库是如何实现的，它都可以使用相同的数据库访问代码。
As illustrated in Figure 16, this object passes the necessary data to the BLL, which then requests the data Access Layer to save the data to MySQL database.
如图16所示，此对象将必要的数据传递给BLL，后者随后请求数据访问层将数据保存到MySQL数据库。
To configure the data layer and the tools that access the database for your application.
为了配置数据层以及应用程序用于访问数据库的工具。
It's a distributed memory caching system which Facebook (and a ton of other sites) use as a caching layer between the web servers and MySQL servers (since database access is relatively slow).
它是一个分布式的内存缓存系统，Facebook(包含其他很多网站)用它作为Web服务器和MySQL服务器之间的缓存层(因为数据库访问相对比较慢)。
The theoretical research of the dependable database concentrates on the multi-layer safe database, access controlling, database encoding, channel control and so on.
安全数据库的理论研究主要集中在多级安全数据库、访问控制、数据库加密与推理通道控制等领域。
The system structure is a multilayer system structure with five layers. They are user interactive layer, system program interface layer, mining core service layer, data access layer, database layer.
系统使用五层体系结构，分别为：用户交互层，系统编程接口层，挖掘核心服务层，数据库访问层，数据库。
Once database schema is changed, user only re-generates the data access layer easily.
一旦数据库发生变更，用户只需重新生成数据访问层即可。
If you change the database structure, you need to accordingly change the data access layer, view layer.
如果改变了数据库结构，就需要相应地改变数据访问层、视图层等。
A visualization information database is designed to solve the heterogeneity problem, providing a unified access to the data layer for the logic layer.
针对海洋数据库数据异构问题，研究设计了可视化信息数据库，为数据可视化业务层提供统一的数据层接口。
PDO provides a data-access abstraction layer, which means that, regardless of which database you're using, you use the same functions to issue queries and fetch data.
PDO提供了一个数据访问抽象层，这就意味着，不管你使用的是哪种数据库，你都可以用同样的函数去进行查询的获取数据。
PDO provides a data-access abstraction layer, which means that, regardless of which database you're using, you use the same functions to issue queries and fetch data.
PDO提供了一个数据访问抽象层，这就意味着，不管你使用的是哪种数据库，你都可以用同样的函数去进行查询的获取数据。
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