ACCESS 触发器delete table事件变量使用及连续删除
ACCESS的TABLE DELETE 事件触发后，会出现一个[旧]的记录，这条记录非常有用，可以用来作条件判断使用。
如下图的table event事件中，删除一条记录后，可以使用[旧]记录连接执行多个删除相关记录的操作。
需要注意的事项是，两个删除动作的FOR循环需要同级！
需要注意的是，‘1’处的变量OldFTid是可以用在’2’处的。语法为：
当条件=[ReviewData].[FTid]=OldFTid
参考文献：
https://msdn.microsoft.com/zh-cn/library/ff973807.aspx
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