mysql查询特定时间段内的数据

先来建表语句：

SET FOREIGN_KEY_CHECKS=0;  
  
-- ----------------------------  
-- Table structure for t_user  
-- ----------------------------  
DROP TABLE IF EXISTS `t_user`;  
CREATE TABLE `t_user` (  
  `userId` bigint(20) NOT NULL,  
  `fullName` varchar(64) NOT NULL,  
  `userType` varchar(16) NOT NULL,  
  `addedTime` datetime NOT NULL,  
  PRIMARY KEY (`userId`)  
) ENGINE=InnoDB DEFAULT CHARSET=utf8;  
  
-- ----------------------------  
-- Records of t_user  
-- ----------------------------  
INSERT INTO `t_user` VALUES ('1', '爽爽', '普通', '2018-01-21 10:20:09');  
INSERT INTO `t_user` VALUES ('2', '贵贵', '普通', '2017-11-06 10:20:22');  
INSERT INTO `t_user` VALUES ('3', '芬芬', 'vip', '2017-11-13 10:20:42');  
INSERT INTO `t_user` VALUES ('4', '思思', 'vip', '2018-01-21 10:20:55');  
INSERT INTO `t_user` VALUES ('5', '妍妍', 'vip', '2017-09-17 10:21:28');  

时间段查询语句：

-- 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：
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