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

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 ...

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 parent of a table inheritance hierarchy, ...

A platform (that is, a CPU architecture and operating system combination) is considered supported by the PostgreSQL development community if the code contains provisions to work on that platform and ...

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 ...

pg_restore — restore a PostgreSQL database from an archive file created by pg_dump Restore only the data, not the schema (data definitions). Table data, large objects, and sequence values are restored ...

Converts string to time stamp according to the given format. (See also to_timestamp(double precision) in Table 9.33.) In a to_char output template string, there are certain patterns that are ...

The SQL standard defines four levels of transaction isolation. The most strict is Serializable, which is defined by the standard in a paragraph which says that any concurrent execution of a set of ...

RETURN with an expression terminates the function and returns the value of expression to the caller. This form is used for PL/pgSQL functions that do not return a set. In a function that returns a ...

Aggregate functions compute a single result from a set of input values. The built-in general-purpose aggregate functions are listed in Table 9.60 while statistical aggregates are in Table 9.61. The ...

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 ...

CREATE TABLE myview (same column list as mytab); CREATE RULE "_RETURN" AS ON SELECT TO myview DO INSTEAD SELECT * FROM mytab; although you can't actually write that, because tables are not allowed to ...