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KEYJOIN

KEYJOIN

KEYJOIN

KEYJOIN

1

It leaves out the word KEY , but by default a JOIN without an ON phrase is a KEY JOIN.

它省去了 KEY 一词，但缺省情况下，没有 ON 短语的 JOIN 是 KEYJOIN 。

2

A generated join condition is a join condition that is automatically created when you specify KEY JOIN or NATURAL JOIN .

生成的连接条件是您指定 KEYJOIN 或 NATURALJOIN 时自动创建的连接条件。

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