DIff. Between AcceptRejectRule, UpdateRule, DeleteRule

[akshaycjoshi]

I have so much confusion about them.
Specially the working of AcceptRejectRul e is troublesome.
What if i set it to none ?
A detailed explaination with an example would be highly appreciated.

Thank you.

[kenobewan]

Here is an article I found using google:
Imposing Constraints on DataSet DataTables