技术教程 编程教程 MySQL：ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails 正文

MySQL：ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails

2023-05-16,,

MySQL在删除一张表时出现

ERROR 1217 (23000): Cannot delete or update a parent row: a foreign key constraint fails

可能是MySQL在InnoDB中设置了foreign key关联，造成无法更新或删除数据。可以通过设置FOREIGN_KEY_CHECKS变量来避免这种情况。

SET FOREIGN_KEY_CHECKS = 0;

然后就可以删除表了。

删除完成后设置

SET FOREIGN_KEY_CHECKS = 1;

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