如何查看表或列的所有外键？

对于表：

SELECt   TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAMEFROM  INFORMATION_SCHEMA.KEY_COLUMN_USAGEWHERe  REFERENCED_TABLE_SCHEMA = '<database>' AND  REFERENCED_TABLE_NAME = '<table>';

对于列：

SELECt   TABLE_NAME,COLUMN_NAME,CONSTRAINT_NAME, REFERENCED_TABLE_NAME,REFERENCED_COLUMN_NAMEFROM  INFORMATION_SCHEMA.KEY_COLUMN_USAGEWHERe  REFERENCED_TABLE_SCHEMA = '<database>' AND  REFERENCED_TABLE_NAME = '<table>' AND  REFERENCED_COLUMN_NAME = '<column>';

基本上，我们在where子句中将REFERENCED_TABLE_NAME更改为REFERENCED_COLUMN_NAME。