postgres=#
postgres=# -- Inheritance
postgres=#
postgres=# CREATE TABLE cities (
postgres(# name text,
postgres(# population real,
postgres(# altitude int
postgres(# );
postgres=#
postgres=# CREATE TABLE capitals (
postgres(# state char(2)
postgres(# ) INHERITS (cities);
CREATE TABLE
postgres=#
postgres=# SELECT name, altitude
postgres-# FROM cities
postgres-# WHERE altitude > 500;
name | altitude
------+----------
(0 rows)
postgres=#
postgres=# SELECT name, altitude
postgres-# FROM ONLY cities
postgres-# WHERE altitude > 500;
name | altitude
------+----------
(0 rows)
postgres=#
postgres=# drop table cities cascade;
NOTICE: drop cascades to table capitals
DROP TABLE
postgres=#
|