Given a table, how to find out this form with which tables?

For example the user list, associated with this table, there may be user_role, user_org, etc., that is to say, if you want to directly in the database, add a user not only to insert content in the user list, also in user_role and user_org is inserted into the corresponding content, similar to this relationship,

How to find out the relationship between the table and table?