目录一、概念二、DML触发器2.1、语句触发器2.2、行级触发器2.3、DML触发器语法：2.4、触发器谓词：2.5、实例说明三、DDL 触发器3.1、DDL触发器语法3.2、DDL 事件3.3、可用属性3.4、实例说明总结一、概念
I have a page_x.php which is nothing special. I also have a page_y.php with a form containing a dropdown field.
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