As shown in Figure 9, there are three levels of resource sharing in data tier.
如图9所示，在数据层中有三个资源共享级别。
The MySQL database is used in the data tier.
在数据层中使用MySQL数据库。
In the data tier, it USES SQL and ODBC.
在数据层，它使用SQL和ODBC。
Added to this mix is the open source database success of MySQL in the data tier.
在这个组合之上，还可以用开放源码数据库MySQL建立数据层。
However, the cost of process hopping to the database is still high, thus performance on the data tier is the first place to look when optimizing your code.
然而进程跳跃到数据库的成本依然很高，因此数据层的性能是您在优化代码时首先要考虑的问题。
Converting between Data-tier Application Projects and Database Projects.
在资料层应用程序专案与资料库专案之间转换。
You want to define and deploy your database by using Data-tier Application Components.
您需要使用数据层应用程序组件来定义和部署数据库。
Reducing code duplication in the data access tier.
减少数据访问层中的代码重复。
The methods in Listing 4 form the core of the data access tier.
清单4中的方法构成了数据访问层的核心。
The generic DAO pattern (also called Typesafe DAO) is critical to reducing code duplication in the data access tier.
泛型dao模式(也称为类型安全的DAO)对于减少数据访问层中的代码重复非常重要。
For example, in the data repository tier, staging and repository databases can be on different servers, on the same server, or even in the same database under different schemas.
例如，在数据存储库层，登台数据库和存储库数据库可以在不同的服务器上、在同一服务器上或者甚至在不同模式下的同一数据库中。
Can we move common data to a separate cache or tier?
我们是否可以将公共数据移动到单独的缓存或层？
Corresponding categories data is stored in an RDBMS at the EIS tier.
相应的种类数据存储在eis层的RDBMS中。
Theory of 3-tiered structure and design and realization of data tier.
三层体系结构理论和数据层的设计实现。
For example, the data tier and the application tier might be located on the same machine in one topology, whereas the two tiers are located on separate machines in the other topology.
例如，在一个拓扑中数据层和应用层可能位于同一计算机上，而这两层在另一个拓扑中位于不同的计算机上。
When a domain object leaves the data access tier, it gets detached from the entity manager.
当域对象离开数据访问层时，它与实体管理器脱离。
Although you can back up an application tier more easily than a data tier, you must perform many steps when you restore an application tier.
尽管备份应用层比备份数据层更加容易，但在还原应用层时必须执行许多步骤。
We recommend that you install the index data service in the data tier.
我们建议您在数据层安装索引数据服务。
Let's briefly discuss each tier, starting with the data integration tier.
让我们简要讨论一下每个层，首先从数据集成层开始。
At the data services orchestration tier, caching is supported by a specialized data caching service.
在数据服务编排层，缓存由专门的数据缓存服务提供支持。
The data tier cannot be accessed directly from the client in the presentation tier.
数据层不能从表示层中的客户端直接访问。
The Domain Model divides into three portions: a presentation tier, an application tier, and a data tier.
领域模型把应用划分成三个部分：表现层，应用层和数据层。
This model is composed of three tiers: data tier, application tier and presentation tier.
模型框架结构分为数据层、应用服务层和视图层。
The middle tier typically connects to the data tier by using a data connection.
中间层通常使用数据连接来连接至数据层。
The data repository tier has two data modules: data staging and data repository.
数据存储库层具有两个数据模块：数据登台(staging)和数据存储库。
In this model, the business data warehouse is the collection of data repository databases (module), and the data marts are the databases from the data mart tier.
在该模型中，业务数据仓库是数据存储库数据库(模块)的集合，而数据集市则是数据集市层中的数据库。
The purpose of the data caching tier is to provide scalable, fault tolerant, coherent data grids for your application server tier.
数据缓存层的目的是为您的应用程序服务器层提供一个可伸缩、容错和一致的数据网格。
So, conceptually, a DSL solution includes two logical tiers: a data services orchestration tier that supports the referred to system process and a data integration tier.
因此，从概念上讲，DSL解决方案包括两个逻辑层：数据服务编排层(此层支持所引用的系统进程)和数据集成层。
Plus, you would have to write additional code in the middle tier to map the relational data to an Object data Model or an XML data Model.
另外，必须在中间层中编写更多代码，将关系数据映射到对象数据模型或XML数据模型。
Plus, you would have to write additional code in the middle tier to map the relational data to an Object data Model or an XML data Model.
另外，必须在中间层中编写更多代码，将关系数据映射到对象数据模型或XML数据模型。
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