mysql日期时间处理

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MySQL数据库：
有时我们要统计一下数据库中指定日期的数据，如常用的，今天，昨天，明天，本周、上周、本月、上个月份的数据，除了我们可以使用strtotime来算还可以参考下面方法。

今天 select * from 表名 where to_days(时间字段名)=to_days(now());

昨天 SELECT * FROM 表名 where TO_DAYS(NOW()) – TO_DAYS(时间字段名) = 1;

　　/DATEDIFF(now() , FROM_UNIXTIME(时间字段名)) = 1; //时间字段存储类型为时间戳/

7天 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名);

　　/DATEDIFF(now() , FROM_UNIXTIME(时间字段名)) = 7; //时间字段存储类型为时间戳/

近30天 SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名);

本月 SELECT * FROM 表名 WHERE DATE_FORMAT(时间字段名, ‘%Y%m’ = DATE_FORMAT(CURDATE(), ‘%Y%m’;

查询当前这周的数据

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,’%Y-%m-%d’)) = YEARWEEK(now());

查询上周的数据

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,’%Y-%m-%d’))
= YEARWEEK(now())-1;

查询当前月份的数据

select name,submittime from enterprise where date_format(submittime,’%Y-%m’)=date_format(now(),’%Y-%m’)

查询距离当前现在6个月的数据

select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();

查询上个月的数据

select name,submittime from enterprise where date_format(submittime,’%Y-%m’)=date_format(DATE_SUB(curdate(), INTER
VAL 1 MONTH),’%Y-%m’)

select * from user where DATE_FORMAT(pudate,’%Y%m’) = DATE_FORMAT(CURDATE(),’%Y%m’) ;

select * from user where WEEKOFYEAR(FROM_UNIXTIME(pudate,’%y-%m-%d’)) = WEEKOFYEAR(now())

select * from user where MONTH(FROM_UNIXTIME(pudate,’%y-%m-%d’)) = MONTH(now())

select * from [user] where YEAR(FROM_UNIXTIME(pudate,’%y-%m-%d’)) = YEAR(now())

and MONTH(FROM_UNIXTIME(pudate,’%y-%m-%d’)) = MONTH(now())
orcal数据库：
从指定日期中获取部分数据：
如月份：
select to_CHAR(sysdate,’MM’) FROM DUAL;
或者：
select extract(month from sysdate) from dual;

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