关系表中应该有数据（多对多）还是应该在单独的表中？
[英]Should there be data in a relationship table(Many-to-Many) or should it be in a separate table?
问题描述
Should data be separated from a relationship table. 
应将数据与关系表分开。
Or should data be within the relationship table? 还是数据应该在关系表中？
Small side question: If there will only ever be 1 user per stock . 小问题：如果1 user per stock只会有1 user per stock 。 Should I rather use a composite key as the primary key in the user_stock table? 我是否应该使用composite key作为user_stock表中的primary key ？
1 个解决方案
解决方案1
0 2014-07-27 10:54:16
它不应是关系表。用户库存表将用作主表。应该为user_Id和库存ID创建复合键，因为用户_id在交易表中不会唯一
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