Mastering Firebase for Android Development

Adding and managing data

Since Firestore is a NoSQL document-oriented database, it will not have rows and tables like an SQL database. You can store the data in the form of documents and collections. Every document contains a set of key-value pairs. Also, Firestore is optimized to store a large collection of the small document. 

All documents should be stored in collections, and Firestore identifies the document by its location in the database. In Firestore, a document is a unit of storage. A document is a record that contains fields. 

A data model allows developers to create a reference for documents. An example is shown as follows: 

DocumentReference alovelaceDocumentRef = db.collection("readers").document("firebaseMastering");

We can also ...