当数据在服务接口与数据库之间来回流动时,需要用这些操作来完成不同格式之间的映射。
They are required to map between the different formats when the data flows from the service interface down to the database and back.
Borland Data Provider为开发人员提供了一个ADO.NET接口,其中包含了对设计时存活数据的支持,以及仅通过单一组件连接到不同数据库的能力。
The Borland data Provider offers an ADO.NET interface for the developer with support for live data at design time, and the ability to connect to different database with just one set of components.
由于该数据库是php之外的,所以将使用数据库抽象模块,其职责是为PHP中各种不同的特定于供应商的数据库函数提供同类接口。
Because this database is external to PHP, you'll use a database-abstraction module with the responsibility of providing a homogeneous interface to PHP's different vendor-specific database functions.
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