SELECT myall.*,myall02.问答
FROM myall02 INNER JOIN myall ON myall.编号 = myall02.编号
SELECT myall.*,myall02.问答
FROM myall,myall02
Where myall.编号 = myall02.编号
以上两个语句都可以成功运行的,结果都一样!我想知道它们的区别?谢谢!
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以下两个SQL语句有什么区别?那个好?
SELECT myall.*,myall02.问答 FROM myall02 INNER JOIN myall ON myall.编号 = myall02.编号 SELECT myall.*,myall02.问答 FROM myall,myall02 Where myall.编号 = myall02.编号 以上两个语句都可以成功运行的,结果都一样!我想知道它们的区别?谢谢!