MySQL查询时间段内的数据

-- 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)

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