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我需要帮助请一个查询。我需要一个能够从表格中获取产品或变体的查询。所以,如果我需要的产品 “一个”,产品 “A1” 的 “b” + 变化。外观查询将如何? 我需要得到从表和到最后产品的三种产品(ID为:a)与具有修饰的价值(价格,质量,销售)取代获取产品及其变体
这里是例如表和行:
products
------------------
CREATE TABLE IF NOT EXISTS `products` (
`id` varchar(10) NOT NULL,
`hidden` tinyint(1) NOT NULL,
`only_variations` int(1) NOT NULL DEFAULT '0',
`price` decimal(20,6) NOT NULL,
`weight_in_package` int(11) NOT NULL COMMENT 'mg',
`stock_pieces` int(11) NOT NULL,
`gifts` text NOT NULL,
`rating` int(11) NOT NULL,
`sold_pieces` int(11) NOT NULL,
`brand` int(11) NOT NULL,
`deleted` int(1) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
INSERT INTO `products` (`id`, `hidden`, `only_variations`, `price`, `weight_in_package`, `stock_pieces`, `gifts`, `rating`, `sold_pieces`, `brand`, `deleted`) VALUES
('a', 0, 0, 12.000000, 50, 10, '', 0, 35, 1, 0),
('b', 0, 0, 11.000000, 50, 15, '', 0, 22, 2, 0);
variations
------
CREATE TABLE IF NOT EXISTS `product_variations` (
`id` varchar(10) COLLATE utf8_bin NOT NULL,
`product` varchar(10) COLLATE utf8_bin NOT NULL,
`price` decimal(20,6) NOT NULL,
`stock_pieces` int(11) NOT NULL,
`weight` int(11) NOT NULL COMMENT 'mg',
`sales` int(11) NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;
INSERT INTO `product_variations` (`id`, `product`, `price`, `stock_pieces`, `weight`, `sales`) VALUES
('a1', 'a', 50.000000, 10, 0, 0),
('a2', 'a', 40.000000, 11, 0, 0);
而这种输出我在SQL查询需要:
id | price | variation
a 12 NULL
b 11 NULL
a 50 a1
非常感谢您的帮助!
'选择\'ID \'\'价格\',null作为\'变化\'由\'产品\'UNION SELECT \'产品\' '\',\'价格\',\'id \'作为变体\'从\'product_variations \'WHERE \'id \'='a1''? - http://sqlfiddle.com /#!9/0f128/2 – Sean