select column_name, data_type, character_maximum_length, column_default, is_nullable
from INFORMATION_SCHEMA.COLUMNS where table_name = '<name of table>';postgres=# \d schema.tablename;
SELECT
table_name,
column_name,
data_type
FROM
information_schema.columns
WHERE
table_name = 'city';\d table_name or \d+ table_name
or
SELECT
table_name,
column_name,
data_type
FROM
information_schema.columns
WHERE
table_name = 'city'; # describe table in postgres
\d+ <postgres_table>