19.13.1. Previous PostgreSQL Versions array_nulls (

Every table has several system columns that are implicitly defined by the system. Therefore, these names cannot be used as names of user-defined columns

NameALTER CONVERSION -- change the definition of a conversion Synopsis

NameDROP FOREIGN TABLE -- remove a foreign table Synopsis

The view pg_tables provides access to useful information about each table in the database.

Namepg_config -- retrieve information about the installed version of PostgreSQL

Nameclusterdb -- cluster a PostgreSQL database

There are two kinds of indexes that can be used to speed up full text searches. Note that indexes are not mandatory for full text searching, but in cases where a column is

Range types are data types representing a range of values of some element type (called the range's subtype). For instance, ranges of

Among all relational operators the most difficult one to process and optimize is the join. The number of possible query plans grows exponentially with