... 记录类型标识符 record type identifier 记录类型表示(法) record type representation 记录类型登记项 record type entry ...
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外键不仅具有标识记录的标识符,而且还具有标识表的一个类型。
The foreign key has not only an identifier to identify a record, but also a type to identify the table.
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使用load方法并传递需要加载的类类型以及记录的标识符值。
You use the load method and pass it the class type you want to load, as well as the identity value for the entry you want.
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