To access a field of a composite column
postgres=#
postgres=# CREATE TYPE inventory_item AS (
postgres(# name text,
postgres(# supplier_id integer,
postgres(# price numeric
postgres(# );
CREATE TYPE
postgres=#
postgres=# CREATE TABLE on_hand (
postgres(# item inventory_item,
postgres(# count integer
postgres(# );
CREATE TABLE
postgres=#
postgres=# INSERT INTO on_hand VALUES (ROW('fuzzy dice', 42, 1.99), 1000);
INSERT 0 1
postgres=#
postgres=# select * from on_hand;
item | count
------------------------+-------
("fuzzy dice",42,1.99) | 1000
(1 row)
postgres=#
postgres=#
postgres=# -- To access a field of a composite column
postgres=#
postgres=#
postgres=# SELECT (item).name FROM on_hand WHERE (item).price > 9.99;
name
------
(0 rows)
postgres=#
postgres=# drop table on_hand;
DROP TABLE
postgres=# drop type inventory_item;
DROP TYPE
postgres=#
postgres=#
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