私は3つのテーブルを持っています:
"products" - contains products
"location" - store location
"product_orders" - joins data from products and location
SQLダンプ:
--
-- Table structure for table `location`
--
CREATE TABLE IF NOT EXISTS `location` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`name` varchar(255) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=77 ;
--
-- Dumping data for table `location`
--
INSERT INTO `location` (`id`, `name`) VALUES
(1, 'Miami'),
(2, 'Denver');
-- --------------------------------------------------------
--
-- Table structure for table `products`
--
CREATE TABLE IF NOT EXISTS `products` (
`id` int(11) NOT NULL AUTO_INCREMENT,
`type` varchar(255) NOT NULL DEFAULT '',
`product` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8 AUTO_INCREMENT=6014552 ;
--
-- Dumping data for table `products`
--
INSERT INTO `products` (`id`, `type`, `product`) VALUES
(1, 'shirt', 'red shirt'),
(2, 'shirt', 'red shirt'),
(3, 'pants', 'blue pants'),
(4, 'pants', 'blue pants');
-- --------------------------------------------------------
--
-- Table structure for table `product_orders`
--
CREATE TABLE IF NOT EXISTS `product_orders` (
`product_id` int(11) NOT NULL,
`location_id` int(11) NOT NULL,
`status` varchar(255) NOT NULL,
PRIMARY KEY (`product_id`,`location_id`),
KEY `ix_product_orders` (`location_id`),
KEY `ix_product_orders_1` (`product_id`)
) ENGINE=MyISAM DEFAULT CHARSET=latin1;
--
-- Dumping data for table `product_orders`
--
INSERT INTO `product_orders` (`product_id`, `location_id`, `status`) VALUES
(1, 1, 'sold'),
(2, 2, 'sold'),
(1, 2, 'available'),
(2, 1, 'sold');
ストア'miamiから販売されたすべての商品を選択したい場合-このクエリは機能します:
SELECT * FROM `products`
INNER JOIN `product_orders`
ON `product_orders`.`product_id`= `products`.`id`
WHERE `product_orders`.`location_id` = '1'
AND
status = 'sold'
マイアミストアから販売されたすべての商品を削除するには、どのように書き直しますか?クエリが機能していません:
DELETE `products` FROM `products`
INNER JOIN `product_orders`
ON `product_orders`.`location_id` = `products`.`id`
WHERE `product_orders`.`location_id` = '2'
AND
status = 'sold'