Query sorts and filters the data at a Database location so only a subset
of the child data is included. This can be used to order a collection of
data by some attribute (for example, height of dinosaurs) as well as to
restrict a large list of items (for example, chat messages) down to a number
suitable for synchronizing to the client. Queries are created by chaining
together one or more of the filter methods defined here.
Just as with a
Reference, you can receive