Introduction to PostgreSQL

PostgreSQL is an object-relational database management system (ORDBMS) based on POSTGRES, developed at the University of California at Berkeley computer science department. POSTGRES pioneered many concepts that only became available in some commercial database systems much later.

PostgreSQL is an open-source descendant of this original Berkeley code. It supports a large part of the SQL standard and offers many modern features:

• complex queries
• foreign keys
• triggers
• views
• transactional integrity
• multiversion concurrency control

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