不能在MySQL-工作台

以下SQL脚本导致错误的代码添加外键约束：1215不能在MySQL工作台不能在MySQL-工作台

DROP TABLE IF EXISTS `bookings`; 
/*!40101 SET @saved_cs_client  = @@character_set_client */; 
/*!40101 SET character_set_client = utf8 */; 
CREATE TABLE `bookings` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `van_id` int(11) NOT NULL, 
    `driver_id` int(11) NOT NULL, 
    `route_id` int(11) NOT NULL, 
    `registered_seats` int(11) NOT NULL, 
    `departure_time` varchar(11) NOT NULL, 
    `arival_time` varchar(11) NOT NULL, 
    `departure_date` varchar(11) NOT NULL, 
    `total_cost` int(11) NOT NULL, 
    `expected_price` int(11) NOT NULL, 


    PRIMARY KEY (`id`), 
    FOREIGN KEY (`van_id`) REFERENCES `van` (`id`) ON DELETE SET NULL, 
    FOREIGN KEY (`driver_id`) REFERENCES `driver` (`id`) ON DELETE SET NULL, 
    FOREIGN KEY (`route_id`) REFERENCES `route` (`id`) ON DELETE SET NULL 
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; 
/*!40101 SET character_set_client = @saved_cs_client */;

添加外键约束作为参考，以下是相关的表的脚本，所有这些工作都很好。

对于表面包车，

DROP TABLE IF EXISTS `van`; 
/*!40101 SET @saved_cs_client  = @@character_set_client */; 
/*!40101 SET character_set_client = utf8 */; 
CREATE TABLE `van` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `vehicle_registration` varchar(45) NOT NULL UNIQUE, 
    `vehicle_type` varchar(45) NOT NULL, 
    `total_seats` int(11) NOT NULL, 
    `category` varchar(45) NOT NULL, 
    `flagged` int(2) DEFAULT 0 NOT NULL, 


    PRIMARY KEY (`id`) 
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; 
/*!40101 SET character_set_client = @saved_cs_client */;

对于表驱动，

DROP TABLE IF EXISTS `driver`; 
/*!40101 SET @saved_cs_client  = @@character_set_client */; 
/*!40101 SET character_set_client = utf8 */; 
CREATE TABLE `driver` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `first_name` varchar(45) NOT NULL , 
    `last_name` varchar(45) DEFAULT NULL, 
    `cnic` varchar(45) NOT NULL UNIQUE, 
    `license_number` varchar(11) NOT NULL UNIQUE, 
    `phonenumber` int(11) NOT NULL unique, 
    `picture` varchar(15) NOT NULL unique, 
    `flagged` int(2) DEFAULT 0, 


    PRIMARY KEY (`id`) 
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; 
/*!40101 SET character_set_client = @saved_cs_client */;

对于表路线，

DROP TABLE IF EXISTS `route`; 
/*!40101 SET @saved_cs_client  = @@character_set_client */; 
/*!40101 SET character_set_client = utf8 */; 
CREATE TABLE `route` (
    `id` int(11) NOT NULL AUTO_INCREMENT, 
    `source` varchar(45) NOT NULL, 
    `destination` varchar(45) NOT NULL, 
    `exp_t_time` varchar(45) NOT NULL, 
    `eco_fare` int(11) NOT NULL, 
    `ac_fare` int(11) NOT NULL, 
    `state` varchar(45) NOT NULL, 


    PRIMARY KEY (`id`) 
) ENGINE=InnoDB AUTO_INCREMENT=6 DEFAULT CHARSET=latin1; 
/*!40101 SET character_set_client = @saved_cs_client */;

来源

2016-11-23 Saadat Rizvi

你首先创建引用的表？ – Uueerdo

我试图设置为空值的属性（外键约束），应该是NOT NULL。我在预订mysql脚本中做了以下更改。

前：

FOREIGN KEY (`van_id`) REFERENCES `van` (`id`) ON DELETE SET NULL, 
    FOREIGN KEY (`driver_id`) REFERENCES `driver` (`id`) ON DELETE SET NULL, 
    FOREIGN KEY (`route_id`) REFERENCES `route` (`id`) ON DELETE SET NULL

后：

FOREIGN KEY (`van_id`) REFERENCES `van` (`id`) ON DELETE CASCADE, 
    FOREIGN KEY (`driver_id`) REFERENCES `driver` (`id`) ON DELETE CASCADE, 
    FOREIGN KEY (`route_id`) REFERENCES `route` (`id`) ON DELETE CASCADE

来源

2016-11-23 17:27:50

不能在MySQL-工作台

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