What is a foreign key with 'set NULL' On 'Event' or Foreign key with 'cascade' On 'Event' in Oracle?

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What is the difference between primary key and unique key not null?
Posted by:
Inamullah Buksh
03-March-2014

Programming Databases PL SQL Oracle

Question added by Deleted user
Date Posted: 2014/07/22

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1 Answers

Deva Gnanam Jayaseelan

by Deva Gnanam Jayaseelan , Lead SSE , MS

You can check this out: http://www.techonthenet.com/oracle/foreign_keys/foreign_null.php

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