Entity create, read, update, and delete (CRUD) operations are performed by entity storage classes; see the Entity API topic for more information. Most entities use or extend the default classes: \Drupal\Core\Entity\Sql\SqlContentEntityStorage for content entities, and \Drupal\Core\Config\Entity\ConfigEntityStorage for configuration entities. For these entities, there is a set of hooks that is invoked for each CRUD operation, which module developers can implement to affect these operations; these hooks are actually invoked from methods on \Drupal\Core\Entity\EntityStorageBase.

whilst traditional REST is the more popular approach for fetching data, it may not be the best in solving many of the problems of handling hierarchical data. In comes GraphQL, a database querying language built by Facebook, to solve the limitations of REST - which may include overfetching, under fetching, multiple round-trips, and versioning issues.

Entity Query API fills the gap between Drupal 8's built-in RESTful Services and Views with an easy to use, out-of-the-box means for loading, filtering and paging entities in a RESTful style. Essentially, this module provides an API to the Entity QueryInterface.

Any enabled entity gets an endpoint at /entity/{entity_type} which responds to GET requests.

You can apply conditions, sorts, and ranges to your query for the given entity type.

MarkLogic is optimized for structured and unstructured data—allowing you to store, manage, query and search across JSON, XML, RDF, geospatial data, text, and large binaries. This means faster time to value and an improved ability to handle change.

Some servers, like Firebase, Parse and CouchDB already define strict communication protocols for clients, and were good fits for Ember Data. In contrast, servers written in Rails, Node, and Django tend to be written in a "REST-style" but lack the precision necessary for drop-in client code. The REST Adapter in Ember Data implicitly defined a protocol that custom servers could implement to get a drop-in client for all of their resources.