Describe the update set-to-null option (for implementing a referential integrity constraint)

What will be an ideal response?


The update set-to-null option allows a record to be changed if its primary key value is referred to by a foreign key value of a record in another relation. As a consequence, in all of the records where the foreign key value refers to the primary key being changed, the value of the foreign key is set to null.

Business

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