无法添加外键MySQL:errno 150
我尝试添加外键:无法添加外键MySQL:errno 150,mysql,sql,Mysql,Sql,我尝试添加外键: CREATE TABLE `invoices` ( `id` int(11) NOT NULL AUTO_INCREMENT, ` name` varchar(255) NOT NULL, `code_text` text NOT NULL, PRIMARY KEY (`id`) ) ENGINE=InnoDB DEFAULT CHARSET=utf8; CREATE TABLE `leads` ( `lead_id` int(11)
CREATE TABLE `invoices` (
`id` int(11) NOT NULL AUTO_INCREMENT,
` name` varchar(255) NOT NULL,
`code_text` text NOT NULL,
PRIMARY KEY (`id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
CREATE TABLE `leads` (
`lead_id` int(11) NOT NULL AUTO_INCREMENT,
...
PRIMARY KEY (`lead_id`)
);
CREATE TABLE `leads_invoices` (
leads_invoice_id int(11) AUTO_INCREMENT NOT NULL,
invoice_id int(11) NOT NULL,
lead_id_i int(11) NOT NULL,
PRIMARY KEY(leads_invoice_id),
FOREIGN KEY (invoice_id) REFERENCES invoices(id),
FOREIGN KEY (lead_id_i) REFERENCES leads(lead_id)
ON UPDATE CASCADE
ON DELETE RESTRICT
) ENGINE=InnoDB DEFAULT CHARSET=utf8
但我的lead\u id\u I密钥出错:
无法创建表crm\u test
leads\u invoices
(错误号:150“Foreign
键约束格式不正确“)
我检查了所有类型和表格,似乎它们都是正确的。。
我怎样才能解决这个问题?希望你能帮助我。谢谢 您必须将
ENGINE=InnoDB DEFAULT CHARSET=utf8
添加到leads表中
CREATE TABLE `leads` (
`lead_id` int(11) NOT NULL AUTO_INCREMENT,
...
PRIMARY KEY (`lead_id`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
因为如果要添加外键,两个表必须具有相同的引擎您必须将
engine=InnoDB DEFAULT CHARSET=utf8
添加到leads表中
CREATE TABLE `leads` (
`lead_id` int(11) NOT NULL AUTO_INCREMENT,
...
PRIMARY KEY (`lead_id`)
)ENGINE=InnoDB DEFAULT CHARSET=utf8;
因为如果要添加外键,两个表必须具有相同的引擎谢谢,这节省了我的时间,也节省了我的时间