常用sql语句

一、时间相关

（1）时间范围查询

查询当天数据

select * from table where to_days(column_time) = to_days(now());

select * from table where date(column_time) = curdate(); 

查询 X 天内

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

查询 X 个月内

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