PostgreSQL
Open SourcePostgreSQL is a robust, open-source object-relational database system renowned for its extensibility, standards compliance, and advanced features. It is highly regarded for its reliability, data integrity, and performance, making it a popular choice for critical enterprise applications and data warehousing.
Key Features
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Robust and feature-rich, often comparable to commercial databases.
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Strong adherence to SQL standards.
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Excellent data integrity and reliability with ACID compliance.