Hi Juan,
The AcceptRejectRule is used to indicate what should take place across the
constraint when AcceptChanges is invoked. If it is set to Cascade, the
corresponding rows in the child table are also accepting changes.
The UpdateRule and DeleteRule are used when a row is being modified/deleted
in the parent table, sometimes when you change a key field, the value has
to be reflected to the child table. That's the function for Update/Delete
Rule.
Kevin Yu
Microsoft Online Community Support
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