Testing Cascading Deletion and Updating
Access 2.0 introduced two new features that were requested by Access 1.x users: cascading deletion and cascading updating of records having a many-to-one relationship. When you delete a record in a primary or base table on which records in a related table depend, cascading deletion automatically deletes the dependent records. Similarly, if you modify the value of a table's primary-key field and a related table has records related by the primary-key field's value, cascading updating changes the value of the related foreign-key field for the related records to the new primary-key field value.
Cascading deletions and cascading updates are special types of action queries that the Jet engine executes for you. ...
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