尽管XML在内部存储为层次化格式，但逻辑上，在数据库表中，它似乎存储在CLOB或BLOB中。
Although internally the XML is stored in a hierarchical format, logically in the database table it appears to be stored in a CLOB or BLOB.
HATS业务逻辑程序使用Atomfeed库构造 feed。
The HATS business logic program constructs the feed using the Atom feed library.
用这个策略，可以前后转移到逻辑数据库模式的任何状态。
With this strategy, you can move up or down to any logical database schema state.
在本例中，数据库处理事务逻辑。
它提供了一种集成业务逻辑和数据库的简便有效的方法。
It provides an effective and easy method to integrate the business logic with databases.
数据库的逻辑模型仅仅是对用户的所有数据需求的一种表示，它将这些需求变成一种范式。
The logical model of the database is simply a representation of all the data requirements of the user, put into a normalized form.
从这个简单的可视设计中，可以容易地把业务逻辑直接映射到数据库表。
From this simple visual design you can easily map the business logic straight into database tables.
这些对象是包含身份验证信息的表和封装了服务器逻辑（针对数据库表执行）的存储过程。
These objects are tables containing authentication information and stored procedures that encapsulate the server logic to operate on the database tables.
因为没有错误处理逻辑，必须依靠数据库的限制，以确保数据的语义完整性。
Because there is no error handling logic, you must rely on database constraints to ensure semantic integrity of the data.
举例来说，对于数据库交互逻辑的设计师来说，不知道他们的逻辑是如何通过用户接口代码表示出来，是很普通的现象。
It is common for architects of database interaction logic, for example, to have no knowledge of how their logic is specifically expressed via user interface code.
任务2：创建一个PHP代码模块来执行必需的业务逻辑和数据库调用。
Task 2: Create a PHP code module to do the necessary business logic and the DB calls.
执行逻辑数据库备份，将数据和逻辑定义从数据库提取到一个文件。
Perform logical database backups as they extract data and logical definitions from the database to a file.
例如，它讨论逻辑和物理数据库设计。
For example, it discusses logical and physical database design.
该信息转换成逻辑的(或物理的)数据库设计。
This information gets transformed into a logical (or physical) database design.
模式提供了数据库中对象的逻辑类别。
Schemas provide a logical classification of objects in the database.
通过去除应用中的重复代码，减少编写数据库控制逻辑的工作，这种方案降低了总的编程量。
This reduces the total programming effort by removing duplicated code in the application and by reducing the amount of effort spent in writing database control logic.
将数据属性保存在XML中可以允许采用非常灵活的模式，能在不用更改逻辑数据库模式的情况下添加或删除属性。
Holding data attributes in XML could allow a very flexible schema in which attributes can be removed or added without changing the logical database schema.
此方法包含从表单提取必需的实例数据并将数据保存到数据库的逻辑。
This method contains the logic to pull the necessary instance data from the form, and then have it saved to the database.
存储过程对于在服务器上封装应用程序逻辑和数据库访问很有价值。
Stored procedures are valuable for encapsulating application logic and database access on the server.
调用适当的银行逻辑来访问数据库并获得结果。
The appropriate bank logic is invoked to access the database and deliver the results.
这种能力包括使用用户界面、业务逻辑和数据库的能力；此外，必须解决与并发、数据集成、用户透明度和复制相关的问题。
This ability affects the user interface, business logic, and database; in addition, it is necessary to address issues regarding concurrency, data integrity, user transparency, and replication.
将选择电影标题背后的原始逻辑作为数据库的键。
Take the original reasoning behind selecting movie title as the key for the database.
逻辑日志记录对数据库服务器实例所做的修改。
The logical log contains a record of changes made to a database server instance.
这个应用逻辑也用来创建数据库。
这时应该创建逻辑单元，以便将数据库访问聚合到相关对象中。
Logical units should be created to aggregate database access to related objects.
这再次说明了使用XML模型的优点和将业务逻辑放在数据库中的简便性。
This fact once again reinforces the advantage of using the XML model and the ease of pushing business logic into the database.
模式是一种数据库对象，用于按照逻辑将相关的数据库对象分组。
Schemas are database objects used to logically group related database objects together.
安装的应用程序将不同的存储库看成是一个单一的逻辑存储库。
Installed applications see the different repositories as a single logical repository.
创建一个新的逻辑数据库(图11)。
具体来说，DAO将业务逻辑与数据库持久性代码分隔开来。
Specifically, DAO separates business logic from database persistence code.
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