我觉得你误会了什么。如果在Oracle中创建外键约束，则默认操作是防止在存在子记录时在主表上删除。



例如，请查看： http://docs.oracle.com/cd/B19306_01/server.102/ b14200 / clauses002.htm＃i1015699 [ ^ ]

I think you have misunderstood something. If you create a foreign key constraint in Oracle, the default action is to prevent a deletion on master table if child records exist.

For example, have a look at: http://docs.oracle.com/cd/B19306_01/server.102/b14200/clauses002.htm#i1015699[^]