Obtaining and manipulating one or more values in the triggering event.
在触发事件中获取或操作一或多个值。
The statement that causes a triggering event might affect multiple rows in the database.
引起触发事件的语句可能会同时影响数据库中的多行。
Whether a trigger fires before or after the triggering event is known as the activation time of the trigger.
触发器的启动是在触发事件之前还是之后则称为触发器的激活时间。
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