最新回答 / Casual328
在表中引入其他表的主键其名字可以不和引入表中名字相同,我感觉SalesOrderHeader表中那个SalesPersonID可能就是外码。当然那个图中指向也不那么明显。如有出入还请老师来解答。
2016-09-24
I really don't like your English,Because not every bodys' English is as well as you,and some may be is hard to learn.
2016-09-20