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PostgreSQL 7.2.3 ��ե���󥹥ޥ˥奢��
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DELETE

Name

DELETE  --  �ơ��֥뤫��Ԥ���

Synopsis

DELETE FROM [ ONLY ] table [ WHERE condition ]

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table

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condition

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WHERE��ˤĤ��ƤΤ��ܺ٤ˤĤ��Ƥϡ�SELECTʸ�򻲾Ȥ��Ʋ�������

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DELETE count

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count��0�ξ�硢�Ԥ��������ʤ��ä����Ȥ򼨤��ޤ���

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DELETE�ϻ��ꤷ���ơ��֥뤫��WHERE����������Ԥ������ޤ���

condition(WHERE��)���ʤ���硢���ꤷ���ơ��֥�����ƤιԤ������뤳�Ȥˤʤ�ޤ������η�̤�¸�ߤ����ΤΡ���Ȥ����Υơ��֥�ˤʤ�ޤ���

Tip: PostgreSQL�γ�ĥ�Ǥ��롢 TRUNCATE�ϡ�����®�ˡ��ơ��֥뤫�����ƤιԤ������뵡�����󶡤��ޤ���

�ǥե���Ȥǡ�DELETE�ϻ��ꤵ�줿�ơ��֥롢�ڤӤ��Υ��֥ơ��֥뤹�٤ƤΥ��ץ�������ޤ������ꤷ���ơ��֥�Τߤ򹹿����������ˤϡ�ONLY�����Ѥ��Ʋ�������

�ơ��֥���ѹ����뤿��ˤϽ񤭹��߸��¤�ɬ�פǤ������碌�ơ� condition���ɤ߹��ޤ���ͤ���ĥơ��֥�ؤ��ɤ߹��߸��¤�ɬ�פˤʤ�ޤ���

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�ơ��֥�films����musical�ʳ������ƺ�����ޤ���

DELETE FROM films WHERE kind <> 'Musical';
SELECT * FROM films;

 code  |           title           | did | date_prod  |  kind   | len
-------+---------------------------+-----+------------+---------+-------
 UA501 | West Side Story           | 105 | 1961-01-03 | Musical | 02:32
 TC901 | The King and I            | 109 | 1956-08-11 | Musical | 02:13
 WD101 | Bed Knobs and Broomsticks | 111 |            | Musical | 01:57
(3 rows)

�ơ��֥�films����ˤ��ޤ���

DELETE FROM films;
SELECT * FROM films;

 code | title | did | date_prod | kind | len
------+-------+-----+-----------+------+-----
(0 rows)

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SQL92

SQL92�Ǥϡ����֤ˤ��DELETEʸ����ǽ�Ǥ��� 

DELETE FROM table WHERE
    CURRENT OF cursor

�����ǡ�cursor�ϥ����ץ�ѤߤΥ�������μ��̻ҤǤ���PostgreSQL �����ü�����������ɤ߼�����ѤǤ���

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