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

N天內記錄

WHERE TO_DAYS(NOW()) - TO_DAYS(時間字段) <= N

今天的記錄

where date(時間字段)=date(now())

或

where to_days(時間字段) = to_days(now());

查詢一周：

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

查詢一個月：

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