PSQL: Defining Arrays

In postgres, an array can be defined using the array syntax like so:

> select array['a','b','c'];
#  array
#---------
# {a,b,c}

If you are inserting into an existing array column, you can use the array literal syntax.

> create temp table favorite_numbers(numbers integer[]);
#CREATE TABLE
> insert into favorite_numbers values( '{7,3,9}' );
#INSERT 0 1
> select numbers[2] from favorite_numbers;
# numbers
#---------
#       3

Postgres also supports two-dimensional arrays.

select array[[1,2,3],[4,5,6],[7,8,9]] telephone;

Via jbranchaud/til.