外鍵（Foreign Key）是指向其他表的主鍵（Primary Key）的欄位，用於確定兩張表的關聯性及資料完整性，以避免部分資料匹配不上的問題。 ... 接下來會以MySQL ... ... <看更多>

You're attempting to do a design that is called Polymorphic Associations. That is, the foreign key may reference rows in any of several ... ... <看更多>

Show All Foreign Keys in MySQL . GitHub Gist: instantly share code, notes, and snippets. ... column_name) AS 'foreign key', concat(referenced_table_name, '. ... <看更多>

Firstly, find out your FOREIGN KEY constraint name in this way: SELECT TABLE_NAME, COLUMN_NAME, CONSTRAINT_NAME, -- <<-- the one you want! ... <看更多>