本周内：
select * from wap_content where week(created_at) = week(now)

查询一天：
select * from table where to_days(column_time) = to_days(now());select * from table where date(column_time) = curdate();

查询7天：
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);

MySql 查询一周内记录