乔伊：要买个新的。
As an initial step you will need to create a new table within the database that you have been using for this application.
作为第一步操作，您需要为该应用程序所用的数据库中创建一个新的表格。
Second, whenever an object changes its role — perhaps you hire one of your graduating students to become a professor — you need to copy the data into the appropriate table and assign it a new OID.
第二，无论何时，只要对象更改了它的角色-可能您聘用了您一个刚毕业的学生作为教授-则需要将数据复制到相应的表中，并为它指定一个新的OID。
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