逗号分隔的联接与MySQL中的语法联接有什么区别? [英] What's the difference between comma separated joins and join on syntax in MySQL?

问题描述

例如，如果我要创建一个表"Person"，该表的"id"列引用表"Worker"中的"id"列

For example if I were to have a table "Person" with a column "id" that references a column "id" in table "Worker"

这两个查询之间有什么区别?它们产生相同的结果.

What would the difference between these two queries be? They yield the same results.

SELECT * 
FROM Person 
JOIN Worker 
  ON Person.id = Worker.id;

和

SELECT * 
FROM Person, 
     Worker 
WHERE Person.id = Worker.id;

谢谢

推荐答案

完全没有区别.

第二种表示形式使查询更具可读性，并使得对于哪个联接对应于哪个条件看起来非常清楚.

Second representation makes query more readable and makes it look very clear as to which join corresponds to which condition.

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