mysql获取7天前数据，日期比较

select * from news where n_date>unix_timestamp( subdate( now() , interval 7
day ))order by n_click  desc

N天内记录

WHERE TO_DAYS(NOW()) - TO_DAYS(时间字段) <= N

今天的记录

where date(时间字段)=date(now())

或

where to_days(时间字段) = to_days(now());

查询一周：

select * from table   where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(column_time);

查询一个月：

select * from table where DATE_SUB(CURDATE(), INTERVAL INTERVAL 1 MONTH) <= date(column_time);