a forward-only dump of the records that match the SQL query attached to the Command object
a forward-only (read-once) mechanism
a lightweight object that provides read-only , forward-only data in a very fast and efficient way
a read-only stream of data returned from the database as the query executes
a stream of data that is returned from a database query
a stream--the data is only available when connected--it can't be persisted as such