If a table has a reflexive relationship in the database, you can join it to itself automatically.
如果表在数据库中有自反关系，可自动将它与自身联接。
You can join a table to itself even if the table does not have a reflexive relationship in the database.
即使资料表在资料库中不具有自反关联性，也可以将资料表联结至它本身。
You can join a table to itself even if the table does not have a reflexive relationship in the database.
即使资料表在资料库中不具有自反关联性，也可以将资料表联结至它本身。
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