Query below returns a list of all columns in a specific table in PostgreSQL.

Query

select ordinal_position as position,
       column_name,
       data_type,
       case when character_maximum_length is not null
            then character_maximum_length
            else numeric_precision end as max_length,
       is_nullable,
       column_default as default_value
from information_schema.columns
where table_name = 'Table name' -- enter table name here
      -- and table_schema= 'Schema name'
order by ordinal_position;

Columns

• position - column position in table, starting at 1
• column_name - name of a column in a table
• data_type - column data type
• max_length - data type max length
• is_nullable - if column is nullable then YES, else NO
• column_default - Default expression of the column

Rows

• One row represents a single column
• Scope of rows: represent all columns in a named table
• Ordered by column's ordinal position

Sample results

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