15.3. Using QueryView to Create Read-Only Entities and Other Specialized Mappings

QueryView is a mapping that allows you to override the default mapping for an entity set and return read-only data. QueryView is something you need to enter manually in the XML, and it belongs in the mapping layer.

A QueryView is a query that is expressed using Entity SQL syntax. However, rather than creating the Entity SQL expression against the conceptual layer of the model as you are accustomed to, the target of the expression is the store (SSDL) layer. In other words, when you construct the Entity SQL for a QueryView, the query is written against the elements of the SSDL.