INTERVIEW QUESTIONS MAINFRAME DB2 DETAILS

Question: What is the self-referencing constraint?

Answer: A31. The self-referencing constraint limits in a single table the changes to a primary key that the related foreign key defines. The foreign key in a self referencing table must specify the DELETE CASCADE rule.

A31. The self-referencing constraint limits in a single table the changes to a primary key that the related foreign key defines. The foreign key in a self referencing table must specify the DELETE CASCADE rule. Source: CoolInterview.com

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