确保没有在数据库关系图设计器中选择任何对象,方法是在该设计器中对象以外的任意位置单击。
Make sure that no objects are selected in Database Diagram designer by clicking anywhere within the designer except on an object.
当保存表或关系图时,约束将在数据库中得到更新。
The constraint is updated in the database when you save your table or diagram.
当保存表或关系图时,约束将在数据库中得到更新。
The constraint is updated in the database when you save your table or diagram.
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