COMMENT ON [ [ DATABASE | INDEX | RULE | SEQUENCE | TABLE | TYPE | VIEW ] object_name | COLUMN table_name.column_name | AGGREGATE agg_name (agg_type) | FUNCTION func_name (arg1, arg2, ...) | OPERATOR op (leftoperand_type rightoperand_type) | TRIGGER trigger_name ON table_name ] IS 'text'
COMMENT�ϡ��ǡ����١������֥������Ȥ˴ؤ��륳���Ȥ���¸���ޤ��������Ȥϡ� psql��\dd�� \d+��\l+ �ʤɤǴ�ñ�˼��������Ȥ��Ǥ��ޤ���obj_description() �� col_description() �Ȥ���̾���Ρ�psql �����Ѥ��Ƥ����Ȥ߹��ߴؿ�����Ѥ���褦�˹��ۤ��뤳�Ȥǡ�¾�Υ桼�����ե������ǥ����Ȥ���Ф����Ȥ��Ǥ��ޤ���
�����Ȥ��Խ�����ˤϡ�Ʊ�쥪�֥������Ȥ��Ф��ƿ����� COMMENT ���ޥ�ɤ�ȯ�Ԥ��ޤ����ƥ��֥������Ȥ���¸����륳����ʸ����� 1 �Ĥ����Ǥ��������Ȥ�������ˤϡ� NULL ��ƥ�����ʸ�������ʬ�˽ޤ������֥������Ȥ�������줿���������Ȥϼ�ưŪ�˺������ޤ���
���ߡ������Ȥ˥������ƥ�������¸�ߤ��ʤ����Ȥˤ����դ��ʤ���Фʤ�ޤ��ǡ����١�������³�����桼����ï�Ǥ⡢���Υǡ����١�����Υ��֥������ȤΥ����ȤȤ��뤳�Ȥ��Ǥ��ޤ�(�������������ѡ��桼���Τߤ���ͭ���Ƥ��ʤ����֥������Ȥ˴ؤ��륳���Ȥ��ѹ����뤳�Ȥ��Ǥ��ޤ�)�����Τ��ᡢ�������ƥ�Ū����̿Ū�ʾ�����Ȥ˵��ܤ��ƤϤ����ޤ���
mytable �ơ��֥�˥����Ȥ��դ��ޤ���
COMMENT ON mytable IS 'This is my table.';
�����Ĥ�¾������ޤ���
COMMENT ON DATABASE my_database IS 'Development Database'; COMMENT ON INDEX my_index IS 'Enforces uniqueness on employee id'; COMMENT ON RULE my_rule IS 'Logs UPDATES of employee records'; COMMENT ON SEQUENCE my_sequence IS 'Used to generate primary keys'; COMMENT ON TABLE my_table IS 'Employee Information'; COMMENT ON TYPE my_type IS 'Complex Number support'; COMMENT ON VIEW my_view IS 'View of departmental costs'; COMMENT ON COLUMN my_table.my_field IS 'Employee ID number'; COMMENT ON AGGREGATE my_aggregate (double precision) IS 'Computes sample variance'; COMMENT ON FUNCTION my_function (timestamp) IS 'Returns Roman Numeral'; COMMENT ON OPERATOR ^ (text, text) IS 'Performs intersection of two text'; COMMENT ON TRIGGER my_trigger ON my_table IS 'Used for R.I.';