how to implement ondelete restrict by a check or a trigger

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hello everybody , in oracle 10g there is no restrict action ondelete , which prevents deleting the referenced record ... how to implement this constraint using a trigger or a check or whatever ...
thanks in advance

Posted 17-Dec-12 2:59am

mido_h_89

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Wendelius · Answer 1 · 2012-12-17T03:55:00

Solution 1

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[^]

Posted 17-Dec-12 3:55am

Wendelius

Updated 17-Dec-12 3:56am

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