按照日期统计每天用户数量

表：userlist     唯一用户：userNum    
按照日期
SELECTcount(distinct
userNum) as newcount,date(from_unixtime(addtime))as
timeFROM
`userlist`group
by date(from_unixtime(addtime))

按照月份

SELECT from_unixtime(addtime,"%Y-%m") as time,count(distinct uid) as newcount FROM `userlist` group by from_unixtime(addtime,"%Y-%m");

结果：