关于sql:什么是MySQL中没有任何东西的“加入”?

What is “join” in MySQL without anything in front?

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SELECT ID, Name, Marks, Grade
FROM Students AS s
JOIN Grades AS g ON s.Marks BETWEEN g.Min_Mark AND g.Max_Mark;

我浏览了大量关于左连接、右连接、内部连接和完全外部连接的资源,但是我不知道这个"连接"是什么意思。这是条捷径吗?如果没有,这是什么?

谢谢。


只需阅读MySQL中的文档即可。上面写着。

In MySQL, JOIN, CROSS JOIN, and INNER JOIN are syntactic equivalents (they can replace each other). In standard SQL, they are not equivalent. INNER JOIN is used with an ON clause, CROSS JOIN is used otherwise.

回答你的问题:连接和内部连接一样