异常处理：1215 - Cannot add foreign key constraint

MySQL Error 1215: Cannot add foreign key constraint

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

1217 - Cannot delete or update a parent row: a foreign key constraint fails

1833 -Cannot change column ‘DEPTNO‘: used in a foreign key constraint ‘...‘ of table ‘...‘

[ERR] 1217 - Cannot delete or update a parent row: a foreign key constraint

[MySQL]ERROR 1822 : Failed to add the foreign key constraint. Missing index for

mysql数据库报错 sql 1452 Cannot add or update a child row:a foreign key constraint fails

Mysql错误1452 - Cannot add or update a child row: a foreign key constraint fails 原因及解决方法

MySQL删除表：Cannot delete or update a parent row: a foreign key constraint fails。