您需要了解并检查资源之间的关系。
从前面可以看出,要比较两个集,必须检查两种子集关系。
As you saw before, comparing sets implies that you have to check two subset relationships.
注意,数据库关系完整性检查在加载过程中禁用。
Note that database relational integrity checks are disabled during the load process.
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