For the M-O (Parent Mandatory,child Optional)case,what Action(s)should Be Taken to Ensure

question 84

Multiple Choice

For the M-O (parent mandatory,child optional) case,what action(s) should be taken to ensure minimum cardinality is maintained?

• A)Define referential integrity constraint from child to parent
• B)Make foreign key NOT NULL
• C)Will require trigger or other application code
• D)Both A and B are correct

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