摘要: JOIN 连接 SELECT * FROM student JOIN score ON student.s_id = score.s_id SELECT * FROM student INNER JOIN score ON student.s_id = score.s_id 备注: (1)JOIN  阅读全文
posted @ 2021-08-23 14:01 ZzzRed 阅读(40) 评论(0) 推荐(0)