mysql分组查询并排序 sql如何实现分组并select出每组前10个？
sql如何实现分组并select出每组前10个？select m， nfrom ( select row_number () over (partition by m order by n de
sql如何实现分组并select出每组前10个？
select m， nfrom ( select row_number () over (partition by m order by n desc) rn，--以m分组，分组内以n倒序排列求每组中各自的序号 m， n from table where ...) wwhere w.rn <=10序号小于10order by m， n desc