PostgreSQL/Array/Array Column

Creating a table with a multidimensional array column

postgres=# -- Creating a table with a multidimensional array column
postgres=#
postgres=# CREATE TABLE authors (id integer,titles text[][]);
CREATE TABLE
postgres=#
postgres=# drop table authors;
DROP TABLE
postgres=#

Creating a table with an array column

postgres=# -- Creating a table with an array column
postgres=#
postgres=# CREATE TABLE books (employee_id integer, books text[]);
CREATE TABLE
postgres=#
postgres=#
postgres=# drop table books;
DROP TABLE
postgres=#

Integer array and text array

postgres=# -- Declaration of Array Types
postgres=#
postgres=# CREATE TABLE sal_emp (
postgres(#    name            text,
postgres(#    pay_by_quarter  integer[],
postgres(#    schedule        text[][]
postgres(# );
CREATE TABLE
postgres=# INSERT INTO sal_emp
postgres-#    VALUES ("A",
postgres(#    "{10000, 10000, 10000, 10000}",
postgres(#    "{{"A", "B"}, {"C", "D"}}");
INSERT 0 1
postgres=#
postgres=# INSERT INTO sal_emp
postgres-#    VALUES ("B",
postgres(#    "{20000, 25000, 25000, 25000}",
postgres(#    "{{"Z", "X"}, {"Y", "Q"}}");
INSERT 0 1
postgres=#
postgres=#
postgres=# SELECT * FROM sal_emp;
 name |      pay_by_quarter       |   schedule
------+---------------------------+---------------
 A    | {10000,10000,10000,10000} | {{A,B},{C,D}}
 B    | {20000,25000,25000,25000} | {{Z,X},{Y,Q}}
(2 rows)
postgres=#
postgres=# drop table sal_emp;
DROP TABLE
postgres=#

Two dimentional array

postgres=# CREATE TABLE t (
postgres(#    squares   integer[3][3]
postgres(# );
CREATE TABLE
postgres=#
postgres=# \d t;
        Table "public.t"
 Column  |   Type    | Modifiers
---------+-----------+-----------
 squares | integer[] |
postgres=#
postgres=# drop table t;
DROP TABLE
postgres=#