database

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MongoDB is a free and open-source cross-platform document-oriented database program. Classified as a NoSQL database program, MongoDB uses JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc.
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Apache Cassandra is a free and open-source distributed database management system designed to handle large amounts of data across many commodity servers, providing high availability with no single point of failure. Cassandra offers robust support for clusters spanning multiple data centers, with asynchronous masterless replication allowing low-latency operations for all clients.
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Oracle databases are collections of data that are handled as a single entity. A database is used to store and retrieve relevant data. A database server is critical to resolving information management issues. In general, a server maintains a huge volume of data reliably in a multiuser context, allowing several users to access the same data simultaneously. All of this is achieved while maintaining an exceptional level of performance. Additionally, a database server protects against unauthorized access and offers rapid recovery options in the case of a failure. This Database is the first of its kind developed specifically for corporate grid computing, the most versatile and cost-effective method of managing data and applications.