Firebase is one kind of NoSQL database. The Firebase database is just a big JSON object where you can store whatever you want inside. Unlike SQL there’s no schema for the database, no tables, no columns, it’s just a combination of key/value pairs .
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Architecture: Firebase is a NoSQL database that stores and syncs data in real-time (a real-time document store); MySQL is an open-source relational database management system based on the domain-specific language SQL.1 Ara 2020
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