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System PostgresDB
 Name Postgres SQL
 Version 10.5 release in august 2018
 Drawbacks Primarily a relational database
 Advantages Open Source Database with a nice ecosystem with periodic upgrades
 Languages Supported C C# C++ Cobol Delphi Fortran Java JCL Perl PHP Python Ruby Visual Basic
 Website postgresql.org
 XML Support yes
 JSON Support yes
 Brief description PostgreSQL, often simply Postgres, is an object-relational database management system (ORDBMS) with an emphasis on extensibility and standards compliance. It can handle workloads ranging from small single-machine applications to large Internet-facing applications (or for data warehousing) with many concurrent users; on macOS Server, PostgreSQL is the default database and it is also available for Microsoft Windows and Linux (supplied in most distributions). PostgreSQL is ACID-compliant and transactional. PostgreSQL has updatable views and materialized views, triggers, foreign keys; supports functions and stored procedures, and other expandability. PostgreSQL is developed by the PostgreSQL Global Development Group, a diverse group of many companies and individual contributors.It is free and open-source, released under the terms of the PostgreSQL License, a permissive software license.
 Database Model Primarily a relational database
 Technical Documentation www.postgresql.org/­docs/­manuals
 License Commercial
 Cloud-based / SaaS Available in AWS and Azure SaaS Option - Available in Google Cloud
 Implementation Language C,C++
 Operating System Supported FreeBSD, HP-UX, Linux, OS X, Solaris, Unix, Windows
 Options for Integration / Access API Native C library JDBC ODBC
 Consistency Highly Consistent
 Foreign Keys Yes
 Streaming Support No
 Analytics Support Need to buy Netezza
 Data Storage Schema Relational Database
 Notable Users Most of the startups and SMEs use this stable open source database with a nice ecosystem of tools supporting it
 Key Differentiator Go to Open Source Database. Earlier Mysql was the most popular but new features have been slow after oracle acquisition.
 Concurrency Yes
 Partitioning No
 Replication Yes
 Secondary Indexes Yes
 SchemaLess No
 SQL Query Yes