The WorkOrders table contains a foreign key, ClientNum, which must match the primary key of the Client table. What type of update to the WorkOrders table would violate referential integrity? If...

The WorkOrders table contains a foreign key, ClientNum, which must match the primary key of the Client table.

1. What type of update to the WorkOrders table would violate referential integrity?


2. If deletes do not cascade, what type of update to the Client table would violate referential integrity?


3. If deletes do cascade, what would happen when a client was deleted?