1、 启动终端并登录MySQL数据库。 2、 此时切换至对应数据库。 3、 例如向branch表中添加新的数据记录。 4、 此时应使用JOIN操作进行数据关联。 5、 可在JOIN前使用LEFT JOIN或RIGHT JOIN，以调整数据连接的方式。

在MySQL中，Join操作通常采用嵌套循环连接（Nested Loop Join）的方式实现。其原理是将驱动表的结果集作为外层循环，逐条取出记录，并以每条记录的字段值为条件，在被驱动表中查找匹配数据，随后合并结果。若有多个关联表，则依次按此方式继续处理。为提升 ...

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