PostgreSQL is an object-oriented, open source database that is fully ACID compliant and highly extensible. It offers a wide variety of built-in data types including JSON, XML, HSTORE (key-value), Geo-spatial (PostGIS), and IPv6. Postgres also offers Library interfaces such as OCI, libpq, JDBC, ODBC, .NET, Perl, Python, Ruby, C/C , PHP, Lisp, Scheme, and Qt.
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