Mysql报错 Cannot delete or update a parent row: a foreign key constraint fails

mysql数据库中使用delete语句删除表中的一条信息时，报错：1451 - Cannot delete or update a parent row: a foreign key constraint fails

1.关闭外键约束

SET FOREIGN_KEY_CHECKS=0;

2.查询

SELECT @@FOREIGN_KEY_CHECKS;

3.语句删除执行

DELETE FROM test WHERE id=1;

4.删除完成后，重新开启外键约束

SET FOREIGN_KEY_CHECKS=1;

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