查询mysql的外键应用信息

查询指定数据库中的所有外键信息

SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE CONSTRAINT_SCHEMA=’数据库名’;举例如下：

SELECT * FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE WHERE CONSTRAINT_SCHEMA='mdmywm';

查询所有引用目标表的外键

select * from INFORMATION_SCHEMA.KEY_COLUMN_USAGE where REFERENCED_TABLE_NAME=’表名’;举例如下：

select * from INFORMATION_SCHEMA.KEY_COLUMN_USAGE  where REFERENCED_TABLE_NAME='department';