Propagation constraint: Difference between revisions

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* Restricted Delete - cannot delete the target row until all rows that point to it (via [[foreign key]]s) have been deleted.
* Cascades Delete - can delete the target row and all rows that point to it (via foreign keys) are also deleted.
* Nullifies Delete - can delete the target row and all foreign keys (pointing to it) are set to [[Null (SQL)|null]].
 
==Bibliography==