How to implement the connection attribute of connecting tables in MySQL in the statement? do I have to create another table?

How to implement the connection attribute of connecting tables in MySQL in the statement? do you have to create a new table? how can the connection attribute of connecting tables in MySQL be implemented in mysql statements, do you have to create another table to indicate their connection attributes, on & nbsp;. column name = B. column name. Specify the connection attributes of tables a and B used to connect to MySQL. how can this problem be achieved in statements? do I have to create another table?
For beginners, how do I implement the connection attributes in MySQL statements when connecting tables? do I have to create another table to indicate their connection attributes?
------ Solution --------------------
On a. column name = B. column name. Specifies the columns used to connect Table a and Table B.