However, if the statement is a data definition statement with an automatic commit as a side effect, that commit does take place. 但是,如果此语句是副作用为自动提交的数据定义语句,则会提交。
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。