Does Firebase use SQL?

The Firebase Realtime Database is a cloud-hosted NoSQL database that lets you store and sync data between your users in realtime. NEW: Cloud Firestore enables you to store, sync and query app data at global scale.

Firebase is a real-time object store. It is not a SQL database and is not intended to be a replacement for one. It completely lacks mechanisms such as JOINs, WHERE query filters, foreign keys, and other tools relational databases all provide.14 Şub 2017

Cloud Firestore is a NoSQL , document-oriented database. Unlike a SQL database, there are no tables or rows.