数据定义语言(DDL)语句是不能回滚的语句。
Data definition language (DDL) statements are not statements that can be rolled back.
确定这些逻辑关系是数据管理者的任务，由数据定义语言完成。
Identifying these logical relationships is a job of the data administrator. A data definition language is used for this purpose.
SQL有两个主要部分：数据定义语言(DDL)和数据操纵语言(DML)。
SQL has two main components: a Data Definition Language (DDL) and a Data Manipulation Language (DML).
这个表也很简单，在SQL中创建结构使用的数据定义语言(DDL)如清单4所示。
It's also pretty simple, and the data definition language (DDL), which is the language you use to create structures in SQL, is in Listing 4.
还可以对实际数据库或数据定义语言(DDL)文件进行反向工程，生成物理数据模型。
Even still, with physical data models you can reverse engineer from the actual database or from the data definition language (DDL) file.
数据定义语言(ddl)为sql中的一部分，可以让数据表建立或是删除。
The data Definition Language (DDL) part of SQL permits database tables to be created or deleted.
一组以数据定义语言来表达的语句集，该语句集完整地描述了数据库的结构。
The set of statements, expressed in data definition language, that completely describe the structure of a data base.
您可以参考清单1中的数据定义语言（DDL）语句，为样例应用程序创建数据库和表。
You can refer to the Data Definition Language (DDL) statements in Listing 1 to create the database and table for the sample application.
根据创建数据库所使用的数据定义语言 (DDL)模式文件，可以确定正在使用的锁类型。
You can determine the types of locks being used from the Data Definition Language (DDL) schema files used to create the database.
此项目还包含用于DB2和Oracle的客户表的数据定义语言 (DDL)文件。
This project also has the Data Definition Language (DDL) files for the customer table for both DB2 and Oracle.
这使管理员能够使用熟悉的SQL数据定义语言(DDL)语句来创建存储XML数据的数据库对象。
This enables administrators to use familiar SQL data definition language (DDL) statements to create database objects for persisting their XML data.
也可以创建数据库级别的触发器，将引发这些触发器以响应数据定义语言(ddl)语句。
You can also create database - level triggers that fire in response to data Definition Language (DDL) statements.
您可以执行数据定义语言(DDL)和数据操作语言(dml)语句，并使用该工具来获取和显示结果。
You can execute both data definition language (DDL) and data manipulation language (DML) statements, and obtain and display the results using this tool.
在该模型中，我们引入了报表数据定义语言和报表格式描述语言，用相应的解释器解释它们。
In our model, report data definition language and report format description language are used with interpreters to interpreter them.
再根据UDT的形式对SQL语言的数据控制语言、数据定义语言和数据操纵语言进行了扩充。
According to UDT, we extend the SQL (Structured Query language) in three aspects: data-control language, data-defined language and data-manipulated language.
可以使用物理数据模型来生成数据定义语言(ddl)语句，然后可以将这些语句部署到一个数据库服务器上。
A physical data model can be used to generate data definition language (DDL) statements which can then be deployed to a database server.
例如，对于信息技术系统而言，变更控制系统可以包括每一软件组件的技术规定说明书脚本、源代码、数据定义语言等。
For example, for information technology systems, a change control system can include the specificationsscripts, source code, data definition language, etc. for each software component.
例如，对于信息技术系统而言，变更控制系统可以包括每一软件组件的技术规定说明书(脚本、源代码、数据定义语言等)。
For example, for information technology systems, a change control system can include the specifications scripts, source code, data definition language, etc.
例如，对于信息技术系统而言，变更控制系统可以包括每一软件组件的技术规定说明书(脚本、源代码、数据定义语言等)。
For example, for information technology systems, a change control system can include the specifications (scripts, source code, data definition language, etc.) for each software component.
db2look工具能够从一个数据库中提取数据定义语言 (DDL)语句，以便在测试数据库中复制产品数据库的数据库对象。
The db2look tool can extract data definition language (DDL) statements from a database in order to reproduce the database objects of a production database on a test database.
使用这个工具，您可以在源数据库中捕获到定义这些对象使用的数据定义语言(DDL)，并在目标数据库中使用这些数据定义语言重新创建这些对象。
Using this tool, you can capture the data definition language (DDL) for such objects in the source database, and apply it to recreate those objects in the target database.
而且，通过自动构建来运行它，您就可以轻松地从您的版本控制库中检查数据定义语言（Data Definition Language，DDL）的最新显示。
What's more, by running it with an automated build, you can painlessly check the latest representation of the Data Definition Language (DDL) from your version-control repository.
通常，当一位dba提议更改时，他使用数据定义语言(Data Definition Language,DDL)提供脚本—比如alter语句—来执行那个更改。
Typically, when a DBA proposes changes, he provides scripts with data definition language (DDL), such as ALTER statements, to execute that change. To create DDL, do the following.
该样本代码提供了组成该结构的数据定义语言（Data Definition Language，DDL）和集成交换格式（Integration Exchange Format，IXF）文件。
The sample code provides the Data Definition Language (DDL) and Integration Exchange Format (IXF) files which make up the structure.
举例来说，如果运行下面的数据定义语言(data definition language,DDL)，首先会创建2GB大小的dbspaceDbdbspace，然后在dbspace Dbdbspace中创建数据库sampledb。
For example if you run the data definition languages (DDLs) mentioned below, dbspace Dbdbspace of size 2 GB would be created first, and then database sampledb is created in the dbspace Dbdbspace.
URI在 mddl.org域中；mddl.org是维护市场数据定义语言（Market Data Definition Language）这一XML词汇表的组织，custodian 是该词汇表中众多元素中的一个。
The URI is in the mddl.org domain; mddl.org is the organization that maintains the Market Data Definition Language, an XML vocabulary in which custodian is one of many elements.
但它通常还包含了可显示文本或其它根据语言需要而变化的数据的定义。
But it also typically contains definitions of displayable text or other data that needs to vary by language.
而消息是用XML定义的——XML 是一种数据格式，其本身就与编程语言和操作系统这些考虑事项无关。
The messages are defined in terms of XML -- a data format that is itself independent of programming languages and operating system considerations.
通常，WSDL提供一个抽象的语言以利用各自的参数和数据类型来定义被发布的操作。
In general, WSDL provides an abstract language for defining the published operations of a service with their respective parameters and data types.
可是不易处理的问题是，应用软件期望这个数据结构用 COBOL语言来定义。
The tricky issue, though, is the fact that the PhoneBook application expects the data structures to be defined in COBOL language.
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