最后，在数据库层还要使用SQL。
如果是一个数据库层配置参数。
数据库层用于存储所有应用程序数据。
The database layer is used for storage of all application data.
纵向扩展通常用于数据库层。
Vertical scaling is typically employed for the database tier.
我们将主要关注于应用层和数据库层。
数据库层在最下面。
数据库层存储、管理数据信息。
已知当前应用程序的数据库层结构非常良好和高效。
The database tier of current applications is known to be very well structured and efficient.
如今，很多应用程序的数据库层都设计为存储过程。
Many applications nowadays design their database layer as stored procedures.
数据库层必须尽可能没有延迟地处理环境中的事务。
The database tier has to process transactions in an environment as near latency-free as possible.
在可能的情况下，新组件可以重用数据库层的功能。
New components could reuse database tier functionalities where possible.
为生产运行而配置数据库层和应用程序层。
Configure the database tier and the application tier for production. Migrate the database tier.
清单3给出包含两个服务器组的数据库层的xml片段。
Listing 3 shows XML fragment for a database tier with two server groups.
结果，Seam还能帮助降低数据库层有限资源的负载。
As it turns out, Seam can also help take a load off of the limited resources of the database tier.
与前两层的情况相反，数据库层的规模评估相当容易。
Web层，应用层和数据库层之间不应该有任何交叉。
There should not be any affinity between the web tier, application tier and the database tier.
数据库层上面的一层常常称为游戏引擎(或游戏服务器)。
On top of that is a layer commonly called the game engine (or game server).
然后，您可以利用数据库快照来确定数据库层的排序活动。
You can then leverage the database snapshot to identify the sort activities at the database level.
此模型分为三层结构，移动数据库层、数据转化层、应用程序层。
And this model is divided into three layers structure: mobile database, data conversion, applications.
应用程序和数据库层之间的联接通常采用关系数据库中的SQL调用格式。
The linkage between the application and database tiers typically takes the form of SQL calls into a relational database.
数据清理模式的传统上下文是数据库层，经常将数据清理模式应用到此层。
The traditional context of the data cleansing pattern is the database layer, which is where it is most often applied.
每个产品都划分为多个层：数据库层、应用程序层和Web服务器层。
Each product was divided into tiers: a database tier, an application tier, and a Web server tier.
按照最基本的形式，这个体系结构可以分为三层：前端层、中间层和数据库层。
In its most basic form, this architecture can be broken down into three tiers: front, mid, and database.
该模式将软件分为四个开发层：界面控制层、业务逻辑层、数据库接口层和数据库层。
This mode partitions the software into four development layers: view controlling layer, business logic layer, database accessing layer and database layer.
例如，度量指标汇总和计算可以传递到数据库层进行处理，而不是在Transformer中处理。
For example, measure aggregation and calculations can be passed to the database layer for processing rather than having Transformer process them.
接下来，在WebSphereProcessServer中创建数据源，以连接到数据库层。
Next, you create a data source in the WebSphere Process Server to connect to the database layer.
这意味着您能够获得典型的SQL联合查询的所有好处，但又不需要在数据库层预定义它们的关系。
This means you can get all the benefits of typical SQL join queries without the burden of predefining their relationships in the database layer.
由于大部分数据库层支持能更好地处理该风险的准备语句，禁用该设置会再次消除这个烦人的性能问题。
Since most database layers support prepared statements that handle this risk much better, turning this off will again remove an annoying performance problem.
DB 2参数可能属于数据库管理器层、数据库层或者注册表层，同时可以进行以下方式修改。
DB2 parameters can at the database manager level, the database level, or the registry level, and can be modified as follows.
例如，基于mysql集群的数据库层可能包含两个服务器组，一个ndbd组和一个manager组。
For example, a mysql-cluster-based database tier would be comprised of two server groups, an NDBD group and a manager group.
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