A relationship that does not enforce referential integrity appears as a thin line between the common fields supporting the relationship.
不实施参照完整性的关系在支持该关系的公共字段之间显示为细线。
A relationship that does not enforce referential integrity appears as a thin line between the common fields supporting the relationship.
不实施参照完整性的关系在支持该关系的公共字段之间显示为细线。
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