on 23-Nov-2023 (Thu)

PostgreSQL is derived from the POSTGRES package written at the University of California at Berkeley

The POSTGRES project, led by Professor Michael Stonebraker, was sponsored by the Defense Ad- vanced Research Projects Agency (DARPA), the Army Research Office (ARO), the National Science Foundation (NSF), and ESL, In

The implementation of POSTGRES began in 1986

PostgreSQL is an object-relational database management system (ORDBMS) based on POSTGRES, Version 4.2

The first “demoware” system became operational in 1987 and was shown at the 1988 ACM-SIGMOD Conference

Version 1, described in [ston90a], was released to a few external users in June 1989.

Version 2 was released in June 1990 with the new rule system.

Version 3 appeared in 1991 and added support for multiple storage managers, an improved query executor, and a rewritten rule system

the Berkeley POST- GRES project officially ended with Version 4.2

In 1994, Andrew Yu and Jolly Chen added an SQL language interpreter to POSTGRES

Postgres95 code was completely ANSI C

The query language PostQUEL was replaced with SQ

The following conventions are used in the synopsis of a command: brackets ([ and ]) indicate optional parts. Braces ({ and }) and vertical lines (|) indicate that you must choose one alternative. Dots (...) mean that the preceding element can be repeated. All other symbols, including parentheses, should be taken literally.

Where it enhances the clarity, SQL commands are preceded by the prompt =>, and shell commands are preceded by the prompt $

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