摘要：
参考 https://blog.csdn.net/IronMan1017/article/details/125196394 https://blog.csdn.net/P_L_Wen97/article/details/123897938 https://blog.csdn.net/hanxiao 阅读全文
摘要：
SELECT * FROMxxx AS t WHERE 1 = 1 AND t.id IN ( select id FROM ( SELECT MAX( t.id ) id FROM xxx AS t WHERE 1 = 1 GROUP BY t.id_number, t.`class` ORDER 阅读全文