MySQL 查詢時間段內的數據

先來建表語句：

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', '貴貴', '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');

下面是sql語句：

-- 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; 

-- 查詢本季度數據

select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(now()); 

-- 查詢上季度數據

select fullName,addedTime FROM t_user where QUARTER(addedTime)=QUARTER(DATE_SUB(now(),interval 1 QUARTER)); 

-- 查詢本年數據

select fullName,addedTime FROM t_user where YEAR(addedTime)=YEAR(NOW()); 

-- 查詢上年數據

select fullName,addedTime FROM t_user where year(addedTime)=year(date_sub(now(),interval 1 year)); 

-- 查詢距離當前現在6個月的數據

select fullName,addedTime FROM t_user where addedTime between date_sub(now(),interval 6 month) and now(); 

-- 查詢當前這周的數據

SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,'%Y-%m-%d')) = YEARWEEK(now()); 

-- 查詢上周的數據

SELECT fullName,addedTime FROM t_user WHERE YEARWEEK(date_format(addedTime,'%Y-%m-%d')) = YEARWEEK(now())-1; 

-- 查詢上個月的數據

select fullName,addedTime FROM t_user where date_format(addedTime,'%Y-%m')=date_format(DATE_SUB(curdate(), INTERVAL 1 MONTH),'%Y-%m'); 

-- 查詢當前月份的數據

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'); 

-- 查詢指定時間段的數據

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';

 歸納一下：

 1、查詢時間段內的數據，一般可以用between and 或 <> 來指定時間段。

 2、mysql的時間字段類型有：datetime，timestamp，date，time，year。

 3、 獲取系統當前時間的函數：

select CURDATE();
select NOW();

4、獲取時間差的函數：

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

5、日期加減函數：

date_sub() 

date_add()     adddate()      addtime()

period_add(P,N)  

6、時間格式轉化函數：

date_format(date, format) ，MySQL日期格式化函數date_format()
unix_timestamp() 
str_to_date(str, format) 
from_unixtime(unix_timestamp, format) ，MySQL時間戳格式化函數from_unixtime

順帶寫一下oracle的查詢語句：

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')