新增、移除及管理主索引键和外部索引键。

Add, remove, and manipulate primary keys and foreign keys.

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包含作为实体类型属性的外部索引键资料行。

Include foreign key columns as properties on entity types.

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以外部索引键关联为基础的关系不支援这个方法。

This method is not supported for relationships based on a foreign key association.

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