数据库ddl和dml
Differences beween DDL (Data Definition Language) and DML (Data Manipulation Language)
DDL（数据定义语言）和DML（数据操作语言）之间的差异
Data Definition Language (DDL) statements are used to define the database structure or schema.
Data Manipulation Language (DML) statements are used for managing data within schema objects.
数据定义语言（DDL）语句用于定义数据库结构或架构。
数据操作语言（DML）语句用于管理架构对象中的数据。
References:
http://www.orafaq.com/faq/what_are_the_difference_between_ddl_dml_and_dcl_commands
参考文献：
http://www.orafaq.com/faq/what_are_the_difference_between_ddl_dml_and_dcl_commands
翻译自: https://www.systutorials.com/what-are-the-differences-between-database-ddl-and-dml/
数据库ddl和dml