Data Definition Language

The data definition language and frame of code have been generated by Rose tool .

利用Rose工具生成了数据定义语言和框架代码；

Create data definition language ( DDL )

创建数据定义语言（DDL）

Data Definition Language ( DDL ) and Data Manipulation Language ( DML )

数据定义语言（DDL）和数据操作语言（DML）

Finally , the generation of Data Definition Language has been improved to be more readily consumable .

最后，数据定义语言（DataDefinitionLanguage）的生成已经过了改进，现在变得更容易使用。

The DDL ( Data Definition Language ) statements throughout this article are provided as a sample .

全文提供了示例DDL（数据定义语言）语句。

The set of statements , expressed in data definition language , that completely describe the structure of a data base .

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。

This project also has the Data Definition Language ( DDL ) files for the customer table for both DB2 and Oracle .

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。

Finally , we perform the Data Definition Language ( DDL ) statements using the executeCommand () method of the Database object .

最后，我们用Database对象的executeCommand（）方法来执行数据定义语言（DDL）语句。

You can refer to the Data Definition Language ( DDL ) statements in Listing 1 to create the database and table for the sample application .

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 execute both data definition language ( DDL ) and data manipulation language ( DML ) statements , and obtain and display the results using this tool .

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。

In our model , report data definition language ( RDDL ) and report format description language ( RFDL ) are used with interpreters to interpreter them .

在该模型中，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。

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 .

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。

DBlook is an important tool that ships with the Derby database engine that is used to generate Data Definition Language ( DDL ) scripts against a database schema .

DBlook是随Derby数据库引擎一起发布的一个重要工具，它用于生成一个数据库模式上的数据定义语言（DataDefinitionLanguage，DDL）脚本。

With one command from a single location , administrators can create new nodes and propagate the required Data Definition Language ( DDL ) across the grid to all the necessary locations .

使用一条来自单个位置的命令，管理员可以创建新节点，跨越整个网格传播所需的DataDefinitionLanguage（DDL）到所有需要位置。

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 .

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。

It provides Data Definition Language ( DDL ) , Data Manipulation Language ( DML ) , as well built-in functions , such as : Sum , Average , Count , Maximum and Minimum .

此系统设有数据定义语言DDL、数据操纵语言DML；还有求和、求平均值、计数、求最大值、求最小值等库函数。

In most development environments , the changes are reversed by dropping all database objects and recreating them using the previous version of the SQL ( Data Definition Language [ DDL ] ) scripts .

在大多数开发环境中，更改是通过删除所有数据库对象，并使用之前版本的SQL（DDL）脚本重新创建它们来逆转的。

Data Definition Language ( DDL ) statements are not statements that can be rolled back , so if a user error involved DDL , you need to take proper measures to bring back your database .

数据定义语言（DataDefinitionLanguage，DDL）语句是不能回滚的语句，因此如果用户错误涉及到DDL，则需要采取恰当的措施恢复数据库。

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 .

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（DataDefinitionLanguage，DDL）的最新显示。

Traditional database design and development usually takes three steps to complete : firstly , hand-drawn ER diagram , and then manually to DDL ( Data Definition Language ) statement . Finally , execute the code in the database management system .

传统的数据库设计、开发工作通常需要3步才能完成：先手工绘制E-R图，然后将其手工转为DDL（datadefinitionlanguage）语句，最后在数据库管理系统中执行这些代码。

Data and structure definition language compiler

数据和结构定义语言编译程序

Its name was changed for legal reasons to SQL ( Structured Query Language ) even though it was built out to become a full data manipulation and definition language .

出于法律原因它被更名为SQL（StructuredQueryLanguage），虽然它的构建初衷是成为一个完全的数据操作和定义语言。

Identifying these logical relationships is a job of the data administrator . A data definition language is used for this purpose .

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。

A prime example is physical data models that directly manipulate SQL Data Definition Language .

一个很好的例子就是直接操作SQL数据定义语言的物理数据模型。

The object-oriented data model is transformed to relationship data model by means of the translation of relationship tables in OODBMS to conventionally data definition language in RDBMS .

在设计阶段，通过将面向对象中的关系表用传统关系数据库的数据定义语言来描述，从而实现了面向对象数据模型向关系型数据模型的转换。