mysql查询当天所有数据sql语句

mysql查询当天的所有信息：

select * from test where year(regdate)=year(now()) and month(regdate)=month(now()) and day(regdate)=day(now())
这个有一些繁琐，还有简单的写法：

select * from table where date(regdate) = curdate();
另一种写法没测试过
查询当天的记录

select * from hb_article_view where TO_DAYS(hb_AddTime) = TO_DAYS(NOW())
date()函数获取日期部分, 扔掉时间部分，然后与当前日期比较即可
补充：本周、上周、本月、上个月份的数据
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(), INTERVAL 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())
select *
from [user]
where pudate between 上月最后一天
and 下月第一天
mysql查询多少秒内的数据

SELECT count( * ) AS c, sum( if( logusertype =2, logusertype, 0 ) ) /2 AS a, sum( if( logusertype =3, logusertype, 0 ) ) /3 AS b
FROM testlog WHERE UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP( logendtime )<=30
查询30秒内记录的总数，loguser等于2的记录的总数和，和 loguser等于3的记录的总数.
if( logusertype =2, logusertype, 0 ) 如果logusetype等于2 就在logusertype上累加，否则加0。
sum( if( logusertype =2, logusertype, 0 ) ) 把logusertype都累加起来。
sum( if( logusertype =2, logusertype, 0 ) ) /2 AS a, 除以2是统计个数。
UNIX_TIMESTAMP(NOW())计算当前时间的秒数，
UNIX_TIMESTAMP( logendtime )计算logendtime的秒数

http://www.3lian.com/edu/2013/08-29/93024.html

DATE_FORMAT(date,format)

DATE_FORMAT(date,format)

date 参数是合法的日期。format 规定日期/时间的输出格式。

可以使用的格式有：

实例

下面的脚本使用 DATE_FORMAT() 函数来显示不同的格式。我们使用 NOW() 来获得当前的日期/时间：

DATE_FORMAT(NOW(),'%b %d %Y %h:%i %p')
DATE_FORMAT(NOW(),'%m-%d-%Y')
DATE_FORMAT(NOW(),'%d %b %y')
DATE_FORMAT(NOW(),'%d %b %Y %T:%f')

结果类似：

Dec 29 2008 11:45 PM
12-29-2008
29 Dec 08
29 Dec 2008 16:25:46.635