本文介绍了MySQL 中逗号分隔的连接和语法上的连接有什么区别?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
例如,如果我有一个表Person",其中一个id"列引用了Worker"表中的id"列
For example if I were to have a table "Person" with a column "id" that references a column "id" in table "Worker"
这两个查询之间的区别是什么?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.
第一种表示使查询更具可读性,并且可以很清楚地看出哪个连接对应哪个条件.
First representation makes query more readable and makes it look very clear as to which join corresponds to which condition.
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