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Mongodb realm12/17/2023 ![]() ![]() Simple: To define and query the database schema, Room offers a clean and concise API. With room, we basically define entities that represent the tables in the database and also a Dao interface where we specify all kinds of interactions that we want to have with those tables as well as write some custom SQL queries. So what are the main factors that make a room database a good choice for us? Room Libary uses the idea of an object-relational mapping orm to map Java or object-oriented objects to a database table. It is intended to be a compact, effective, and user-friendly replacement for conventional SQLite databases. Room database is an open-source database library created by Google exclusively for Android applications. The room also provides compile-time checks of SQLite statements. Instead of using SQLite directly, Room simplifies the chores of database setup, configuration, and interactions with the app. ![]() Room is an abstraction layer on top of an SQLite database. Previously most of the apps use SQLite database, which is a standard library to store data using a specialized language (SQL) to perform database operations. Now we use Room which is a persistence library that's part of Android Jetpack. Nowadays, Room and Realm db is very popular and used amongst developers, so we are going to compare Room which is an abstraction layer on top of an SQLite Database, and Realm Database, which is a NoSQL database, in detail. Whereas in the case of NoSQL Mongo Realm/ Realm DB, Couchbase, UnQLite, etc. Mostly used SQL databases are SQLite, LiteDB, Coredata, Oracle Database Lite, extremeData, and many more in the line. There are two main categories of databases SQL databases (Relational) and NoSQL databases. it ensures that the data isn't lost or removed even when the app is closed, the data downloaded from the internet is safely saved on the device, so it doesn't need to reload the data and is user ready. For this, we use a database to store this persistent data.ĭata persistence is a very important part of Android Development. Anything that is available for you without access to the internet is obviously stored on a device. It could be anything like storing messages, contacts, images, music, and other files. Most of the apps you use on daily basis store data on mobile devices. ![]()
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