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Title: For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure ... Post by: lbelcher on Feb 11, 2019 For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure minimum cardinality is maintained?
• Define referential integrity constraint from child to parent • Make foreign key NOT NULL • Will require trigger or other application code • Both Define referential integrity constraint from child to parent and Make foreign key NOT NULL are correct Title: For the M-O (parent mandatory, child optional) case, what action(s) should be taken to ensure ... Post by: Nashua on Feb 11, 2019 Content hidden
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