可以调整主键的生成策略，甚至指定复合主键。
You can adjust the primary-key creation strategy or even specify a composite primary key.
我应该使用复合主键如果我使用JPA和键可以改变吗？
Should I use composite primary keys if I use JPA and the keys can change?
实体中的多个属性可以组合成一个复合的主键。
Multiple attributes in the entity may be combined to form a composite primary key.
如果定义复合键，则主键中列的顺序与关系图的表中显示的列顺序匹配。
If you define a compound key, the order of columns in the primary key matches the order of columns as shown in the table in your diagram.
如果定义复合键，则主键中列的顺序与关系图的表中显示的列顺序匹配。
If you define a compound key, the order of columns in the primary key matches the order of columns as shown in the table in your diagram.
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