可以立即为已有数据库连接添加新层。
Adding new layers for existing database connections can be done right away.
允许在没有数据库连接的情况下使用保存的模型。
Let you work with a disconnected, saved model for the database connection.
而link则可被设为对现有数据库连接或对象的一个引用。
You can set link as a reference to an existing database connection link or object.
既可以从现有数据库连接的列表进行选择，也可以添加一个新连接。
You can select from a list of existing database connections or add a new connection.
数据库浏览器：该面板显示在RationalDataArchitect之内或之外设置的所有数据库连接(即编目的DB 2数据库)。
Database explorer: This pane presents all the database connections you have setup, either through Rational data Architect, or outside it (in other words, a cataloged DB2 database).
通过任何连接到大学网络的计算机都可以访问图书馆的所有数据库和电子资源。
All of the library's databases and electronic sources can be accessed through any computer connected to the university network.
虽然这看上去合乎逻辑，但是存在一个重要影响：如果由于某种原因关闭了数据库连接，那么也将关闭该数据库包含的所有数据库对象。
Although it may seem logical, this has an important effect: If a database connection is closed for some reason, any database objects that it contains are also closed.
至于所有数据库交互，我们需要设置数据库连接并提取数据。
As with all database interaction, we need to set up our database connections and get our data out.
平面表示按照类型组织所有数据库对象，允许按照名称、模式、连接别名等对对象进行排序。
The flat presentation organizes all the database objects by type, which enables you to sort objects by name, schema, connection alias, and so on.
您的虚拟应用程序可以连接到这个现有数据库，而不用创建自己的数据库。
Your virtual application can then connect to this existing database as opposed to creating its own.
一旦更新了在前一节讨论的所有数据库配置参数，就需要确保所有应用程序从数据库断开连接。
Once all of the database configuration parameters that we discussed in the previous section are updated, you will need to make sure all applications disconnect from the database.
对于典型的J2EE应用程序，会对所有数据库访问使用单个连接池标识。
With typical J2EE applications, a single connection pool identity is used for all database access.
引用完整性是一个美妙的sql术语，它指的是保持数据库中的所有数据都是干净的，没有错误或者多余的数据，表之间的连接准确合理。
Referential integrity is a fancy SQL term that refers to keeping all the data in your database clean, free from incorrect or unused data, and accurate in terms of joins across tables.
只有具有数据库CONNECT权限的用户才能重用可信连接。
Only users with connect privileges on the database can re-use a trusted connection.
没有对JDBC驱动程序的引用，没有服务器名称，没有用户名称或口令——甚至没有数据库池或连接管理。
No references to JDBC drivers, no server names, no user names or passwords — not even database pooling or connection management.
此时，您还只能连接至现有数据库。
At this point you're only connecting to an existing database.
DB 2包含一个称为系统数据库目录(system database directory)的二进制文件，其中包含可从DB 2机器上连接的所有数据库的条目。
DB2 does contain a binary file known as the system database directory that contains entries of all the databases you can connect from your DB2 machine.
这将导致特定连接上的所有数据库工件都会在IDE的Databaseexplorer树型视图中自动显示，如图4所示。
This will result in the automatic display of all database artifacts for that particular connection in the database Explorer tree view of the IDE, as shown in Figure 4.
你需要在你的叉建立一个新的连接，即使没有数据库访问。
You need to establish a new connection in your fork even it has no database access.
连接到现有数据库，例如人力资源数据库。
Connect to an existing database, such as a human resources database.
只要数据库连接被关闭，这个私有数据库就会被自动删除。
This private database will be automatically deleted as soon as the database connection is closed.
您可以使用可视化数据库工具的服务器资源管理器窗口连接到现有数据库。
You can connect to an existing database using the Server Explorer window of the Visual database Tools.
利用实体数据模型向导，您可以从现有数据库生成概念性模型，并将数据库连接信息添加到应用程序中。
The Entity Data Model Wizard lets you generate a conceptual model from an existing database and adds database connection information to your application.
连接到现有数据库。
连接到现有数据库。
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