Query based summarization techniques, additionally model for relevance of the summary with the query. Queries are processed by an optimizing query processor. They can be used in an Entity SQL query. Codd proposed such an algebra as a basis for database query languages. Consider an image search initiated by a text query. Instead, users search by submitting an image as their query. The "command line" server query is normally a single name specification. Turtle syntax is similar to that of SPARQL, an RDF query language. Featured Snippet is a summary of an answer to user's query. Hibernate also provides data query and retrieval facilities. This is known as a "recursive query" or "recursive lookup". Jet passes the data retrieved for the query in a dynaset. In such a scenario, learning algorithms can actively query the user/teacher for labels. Responses to query commands are typically ASCII strings. The index helps find information relating to the query as quickly as possible.