ICode9

根据fcustno分类，按ftime排序（不同的fcustno,fnum从1开始算） 取fcustno和对应的最大ftime： select * from ( SELECT FCUSTNO,FTIME,row_number() over(partition by FCustNo order by FTIME desc) fnum from tableName ) where fnum=1; 自定义排序 select * from tableName where