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PostgreSQL/Array/Array Column - История изменений
2026-04-06T23:33:59Z
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в 13:45, 26 мая 2010
2010-05-26T13:45:56Z
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http://sqle.ru/index.php?title=PostgreSQL/Array/Array_Column&diff=5019&oldid=prev
Admin: 1 версия
2010-05-26T10:14:37Z
<p>1 версия</p>
<p><b>Новая страница</b></p><div>==Creating a table with a multidimensional array column==<br />
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<!-- start source code --><br />
<br />
<source lang="sql"><br />
<br />
postgres=# -- Creating a table with a multidimensional array column<br />
postgres=#<br />
postgres=# CREATE TABLE authors (id integer,titles text[][]);<br />
CREATE TABLE<br />
postgres=#<br />
postgres=# drop table authors;<br />
DROP TABLE<br />
postgres=#<br />
<br />
</source><br />
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==Creating a table with an array column==<br />
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<!-- start source code --><br />
<br />
<source lang="sql"><br />
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postgres=# -- Creating a table with an array column<br />
postgres=#<br />
postgres=# CREATE TABLE books (employee_id integer, books text[]);<br />
CREATE TABLE<br />
postgres=#<br />
postgres=#<br />
postgres=# drop table books;<br />
DROP TABLE<br />
postgres=#<br />
<br />
</source><br />
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==Integer array and text array==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
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postgres=# -- Declaration of Array Types<br />
postgres=#<br />
postgres=# CREATE TABLE sal_emp (<br />
postgres(# name text,<br />
postgres(# pay_by_quarter integer[],<br />
postgres(# schedule text[][]<br />
postgres(# );<br />
CREATE TABLE<br />
postgres=# INSERT INTO sal_emp<br />
postgres-# VALUES ("A",<br />
postgres(# "{10000, 10000, 10000, 10000}",<br />
postgres(# "{{"A", "B"}, {"C", "D"}}");<br />
INSERT 0 1<br />
postgres=#<br />
postgres=# INSERT INTO sal_emp<br />
postgres-# VALUES ("B",<br />
postgres(# "{20000, 25000, 25000, 25000}",<br />
postgres(# "{{"Z", "X"}, {"Y", "Q"}}");<br />
INSERT 0 1<br />
postgres=#<br />
postgres=#<br />
postgres=# SELECT * FROM sal_emp;<br />
name | pay_by_quarter | schedule<br />
------+---------------------------+---------------<br />
A | {10000,10000,10000,10000} | {{A,B},{C,D}}<br />
B | {20000,25000,25000,25000} | {{Z,X},{Y,Q}}<br />
(2 rows)<br />
postgres=#<br />
postgres=# drop table sal_emp;<br />
DROP TABLE<br />
postgres=#<br />
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</source><br />
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==Two dimentional array==<br />
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<!-- start source code --><br />
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<source lang="sql"><br />
postgres=# CREATE TABLE t (<br />
postgres(# squares integer[3][3]<br />
postgres(# );<br />
CREATE TABLE<br />
postgres=#<br />
postgres=# \d t;<br />
Table "public.t"<br />
Column | Type | Modifiers<br />
---------+-----------+-----------<br />
squares | integer[] |<br />
postgres=#<br />
postgres=# drop table t;<br />
DROP TABLE<br />
postgres=#<br />
<br />
</source></div>
Admin