mysql - MySQL 中的外键关系错误。

Question

我是 MySQL 的初学者

每当我尝试向字段添加外键时，都会产生此错误:

ERROR 1064 (42000): You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ADD FOREIGN KEY ID

这是添加外键的代码:

ALTER TABLE 'table_name'
ADD CONSTRAINT 'FK_FKName'
ADD FOREIGN KEY table_name(column_name)
REFERENCES OtherTable_name(OtherTable_column_name);

请尝试帮助我

Answer 1

你可以尝试没有限制名称:

ALTER TABLE 'table_name'
ADD FOREIGN KEY table_name(column_name)
REFERENCES OtherTable_name(OtherTable_column_name);