belongs to Maven artifact android.arch.persistence.room:common:1.0.0
Marks the class as a Data Access Object.
Data Access Objects are the main classes where you define your database interactions. They can include a variety of query methods.
The class marked with
@Dao should either be an interface or an abstract class. At compile
time, Room will generate an implementation of this class when it is referenced by a
@Dao class can optionally have a constructor that takes a
as its only parameter.
It is recommended to have multiple
Dao classes in your codebase depending on the tables