PostgreSQL 16.4 Support with Oracle Compatibility Dear Community Members, We are thrilled to announce the release ...

A dump/restore using pg_dumpall, or use of pg_upgrade, is required for those wishing to migrate data from any previous release. Version 9.6 contains a number of ...

pg_upgrade (formerly called pg_migrator) allows data stored in PostgreSQL data files to be upgraded to a later PostgreSQL major version without the data dump/restore ...

PostgreSQL provides various lock modes to control concurrent access to data in tables. These modes can be used for application-controlled locking in situations where MVCC does not give the desired ...

CREATE FUNCTION defines a new function. CREATE OR REPLACE FUNCTION will either create a new function, or replace an existing definition. To be able to define a function, the user must have the USAGE ...

SQL input consists of a sequence of commands. A command is composed of a sequence of tokens, terminated by a semicolon (“;”). The end of the input stream also terminates a command. Which tokens are ...

This section describes the detailed format of each message. Each is marked to indicate that it can be sent by a frontend (F), a backend (B), or both (F & B). Notice that although each message includes ...

CREATE TABLE will create a new, initially empty table in the current database. The table will be owned by the user issuing the command. If a schema name is given (for example, CREATE TABLE ...

Aggregate functions compute a single result from a set of input values. The built-in general-purpose aggregate functions are listed in Table 9.59 while statistical aggregates are in Table 9.60. The ...

7.2.3. The GROUP BY and HAVING Clauses The FROM clause derives a table from one or more other tables given in a comma-separated table reference list. When a table reference names a table that is the ...

This release contains a variety of fixes from 12.19. For information about new features in major release 12, see Section E.21. The PostgreSQL community will stop releasing updates for the 12.X release ...