摘要：上面为表结构 下面则为 相关函数写法 写这些主要是为了学习下与Oracle的区别 SELECT * FROM STUDENT CROSS JOIN TEACHER;--交叉连接 SELECT * FROM STUDENT S INNER JOIN TEACHER T ON S.TEACHER_ID=T.ID;--内连接 SELECT * FROM STUDENT S LEFT OUTER J... 阅读全文