Manipulating DataSet Relationships
Create and Manipulate DataSets: Manipulate DataSet Relationships.
As an in-memory representation of a database, the DataSet object retains the notion of relations between tables. As you would expect, this means that a DataSet schema can also store information on keys and relationships in the DataSet object that it represents. In this section, you'll see how to add keys to a DataSet schema, and then how to create relationships betweeen multiple tables that are part of the same DataSet schema.
Adding Keys to a DataSet Schema
The DataSet schema designer allows you to create two types of keys. You can identify a field or a set of fields as the primary key for a table, or you can identify a field or a set of fields ...
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