SET FOREIGN_KEY_CHECKS=0;

    下面是sql语句：

[sql] view plain copy
-- 今天
select fullName,addedTime from t_user where to_days(addedTime) = to_days(now());
-- 昨天
select fullName,addedTime from t_user where to_days(NOW()) - TO_DAYS(addedTime) <= 1;
-- 近7天
select fullName,addedTime from t_user where date_sub(CURDATE(),INTERVAL 7 DAY) <= DATE(addedTime);
-- 近30天
SELECT fullName,addedTime FROM t_user where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(addedTime);
-- 本月
SELECT fullName,addedTime FROM t_user WHERE DATE_FORMAT( addedTime, ‘%Y%m‘ ) = DATE_FORMAT( CURDATE() , ‘%Y%m‘ );
-- 上一月
SELECT fullName,addedTime FROM t_user WHERE PERIOD_DIFF( date_format( now( ) , ‘%Y%m‘ ) , date_format( addedTime, ‘%Y%m‘ ) ) =1;
-- 查询本季度数据
select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(now());
-- 查询上季度数据
select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));
-- 查询本年数据
select fullName,addedTime FROM t_user where YEAR(addedTime)=YEAR(NOW());
-- 查询上年数据
select fullName,addedTime FROM t_user where year(addedTime)=year(date_sub(now(),interval 1 year));
-- 查询距离当前现在6个月的数据
select fullName,addedTime FROM t_user where addedTime between date_sub(now(),interval 6 month) and now();

-- 查询当前这周的数据
SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,‘%Y-%m-%d‘)) = YEARWEEK(now());
-- 查询上周的数据
SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,‘%Y-%m-%d‘)) = YEARWEEK(now())-1;
-- 查询上个月的数据
select fullName,addedTime FROM t_user where date_format(addedTime,‘%Y-%m‘)=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),‘%Y-%m‘);
-- 查询当前月份的数据
select fullName,addedTime FROM t_user where DATE_FORMAT(addedTime,‘%Y%m‘) = DATE_FORMAT(CURDATE(),‘%Y%m‘);
select fullName,addedTime FROM t_user where date_format(addedTime,‘%Y-%m‘)=date_format(now(),‘%Y-%m‘);

-- 查询指定时间段的数据
select fullName,addedTime FROM t_user where addedTime between ‘2017-1-1 00:00:00‘ and ‘2018-1-1 00:00:00‘;
select fullName,addedTime FROM t_user where addedTime >=‘2017-1-1 00:00:00‘ and addedTime < ‘2018-1-1 00:00:00‘;

    归纳一下：
    1、查询时间段内的数据，一般可以用between and 或 <> 来指定时间段。

    2、mysql的时间字段类型有：datetime，timestamp，date，time，year。

   3、 获取系统当前时间的函数：

    select CURDATE();
    select NOW();

    4、获取时间差的函数：

    period_diff()    datediff(date1,date2)      timediff(time1,time2)

   5、日期加减函数：

    date_sub() 

    date_add()     adddate()      addtime()

    period_add(P,N)    

    --------以上参考文章（mysql日期加减）

    6、时间格式转化函数：

    date_format(date, format) ，MySQL日期格式化函数date_format()
    unix_timestamp()
    str_to_date(str, format)
    from_unixtime(unix_timestamp, format) ，MySQL时间戳格式化函数from_unixtime

    --------以上参考文章（MYSQL日期 字符串 时间戳互转）

    顺带写一下oracle的查询语句：

[sql] view plain copy
select * from Oracle.alarmLog where alarmtime between to_date(‘2007-03-03 18:00:00‘,‘yyyy-mm-dd hh24:mi:ss‘) and to_date(‘2007-09-04 18:00:00‘,‘yyyy-mm-dd hh24:mi:ss‘)

另一篇博客

MySQL获取某个时间范围内的数据 TO_DAYS(date)函数
1、利用to_days函数查询今天的数据：

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

to_days函数：返回从0000年（公元1年）至当前日期的总天数。
2、昨天
SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) – TO_DAYS( 时间字段名) <= 1
3、7天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名)
4、近30天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名)
5、本月
SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, ‘%Y%m‘ ) = DATE_FORMAT( CURDATE( ) , ‘%Y%m‘ )
6、上一月
SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , ‘%Y%m‘ ) , date_format( 时间字段名, ‘%Y%m‘ ) ) =1

查询本季度数据

select * from ht_invoice_information where QUARTER(create_date)=QUARTER(now());

查询上季度数据

select * from ht_invoice_information where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

查询本年数据

select * from ht_invoice_information where YEAR(create_date)=YEAR(NOW());

查询上年数据

select * from ht_invoice_information where year(create_date)=year(date_sub(now(),interval 1 year));

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
where date(regdate) = curdate();
select from test where year(regdate)=year(now()) and month(regdate)=month(now()) and day(regdate)=day(now())
SELECT date( c_instime ) ,curdate( )
FROM t_score
WHERE 1
LIMIT 0 , 30

原文地址：https://www.cnblogs.com/plusUltra/p/10967072.html