Data Definition Language

The language features the complex engineering object definition and manipulation, multi-version data manage-ment, local database definition, generation and manipulation for supporting long term engineering application transactions, the integrity control localization, and schema modification.

面向复杂工程对象的定义和操作，多版本数据的管理，定义、生成和操作局部库以支持工程应用长事务、完整性控制的局部化和模式的修改，是COHORL的主要功能。

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

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

You can also create database-level triggers that fire in response to Data Definition Language ( DDL ) statements.

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.

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

数据定义语言（DDL）和数据操作语言（DML）

Note that supplying connection information does not initiate data definition language ( DDL ) generation.

请注意,提供连接信息不启动数据定义语言 ( DDL ) 生成.

The Create Database Wizard generates data definition language for creating a database.

“生成数据库”向导生成创建数据库时所需的数据定义语言.

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（Data Definition Language，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。

The Data Definition Language ( DDL ) part of SQL permits database tables to be created or deleted.

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.

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（Structured Query Language），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。

XPressed 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.