一.连接查询:
1.1、什么是连接查询?
在实际开发中,大多数情况下并不是从单个表中查询数据,而是通常通过多个表的联合查询来获得最终结果。
[En]
In the actual development, in most cases, the data is not queried from a single table, but the final result is generally obtained by the joint query of multiple tables.
在实际开发中,一个业务一般会对应多个表,比如:学生表和班级表,至少两个表。
[En]
In the actual development, generally a business will correspond to multiple tables, such as: students and classes, at least two tables.
stuno stuname classno classname
Original: https://www.cnblogs.com/Burning-youth/p/15677875.html
Author: 猿头猿脑的王狗蛋
Title: 【MySQL】笔记(3)— 连接查询;子查询;union;limit;
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