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获取相同的ID我有我的mysql数据库2个表:从细节表
CREATE TABLE IF NOT EXISTS `RECIPES` (
`recipes_id` int(11) NOT NULL AUTO_INCREMENT,
`title` varchar(50) COLLATE utf8_bin NOT NULL,
`text` varchar(2000) COLLATE utf8_bin NOT NULL,
`count_persons` int(11) NOT NULL,
`duration` int(11) NOT NULL,
`user_id` int(11) NOT NULL,
`date` datetime NOT NULL,
`accepted` int(11) NOT NULL DEFAULT '0',
PRIMARY KEY (`recipes_id`),
KEY `recipes_user_fk` (`user_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin AUTO_INCREMENT=88 ;
CREATE TABLE IF NOT EXISTS `RECIPES_POS` (
`recipes_pos_id` int(11) NOT NULL AUTO_INCREMENT,
`recipes_id` int(11) NOT NULL,
`ingredients_id` int(11) NOT NULL,
`ingredients_value` int(11) NOT NULL,
PRIMARY KEY (`recipes_pos_id`),
KEY `recipe_pos_rec_id` (`recipes_id`),
KEY `recipes_pos_ingredient_fk` (`ingredients_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=58 ;
在Recipe_Pos表有很多条目。此表显示配方中使用的成分。
现在我想找到包含了像粉和糖incredients配方:
SELECT r.recipes_id FROM RECIPES r, RECIPES_POS rp WHERE r.recipes_id = rp.recipes_id AND rp.ingredients_id =6 AND rp.ingredients_id =4
这statment是错误的,因为在Recipe_Pos一个条目不能同时包含incredients。
什么是正确的查询?它应该只用1个便宜和更多