mysql 查詢當天、最近一天、最近一周，本月，上一個月的數據
今天
select * from 表名 where to_days(時間字段名) = to_days(now());
昨天
SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 時間字段名) <= 1
7天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(時間字段名)
近30天
SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(時間字段名)
本月
SELECT * FROM 表名 WHERE DATE_FORMAT( 時間字段名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' )
上一月
SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 時間字段名, '%Y%m' ) ) =1
#查詢本季度數據
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(now());
#查詢上季度數據
select * from `ht_invoice_information` where QUARTER(create_date)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));
#查詢本年數據
select * from `ht_invoice_information` where YEAR(create_date)=YEAR(NOW());
#查詢上年數據
select * from `ht_invoice_information` where year(create_date)=year(date_sub(now(),interval 1 year));
查詢當前這周的數據
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());
查詢上周的數據
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;
查詢當前月份的數據
select name,submittime from enterprise where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')
查詢距離當前現在6個月的數據
select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();
查詢上個月的數據
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
Mysql數據庫中獲取系統時間，年，月，日單個獲取
獲取當前系統日期時間：select SYSDATE() AS 系統日期時間;
獲取當前系統年月日：select current_date AS 年月日;
獲取當前系統年份：select year(CURRENT_DATE) AS 年 ;
獲取當前系統月份：select month(CURRENT_DATE) AS 月;
獲取當前系統日：select day(CURRENT_DATE) AS 日;
獲取當前系統時間：select time(SYSDATE()) AS 系統時間;
獲取當前系統小時：select HOUR(SYSDATE()) AS 系統小時;
獲取當前系統分鍾：select MINUTE(SYSDATE()) AS 系統分鍾;
獲取當前系統秒：select SECOND(SYSDATE()) AS 系統秒;
獲取當前系統毫秒：select MICROSECOND(SYSDATE()) AS 系統秒;
Mysql數據庫中獲取系統時間，年，月，日單個獲取
Mysql數據庫中獲取系統時間，年，月，日
select curdate(); --獲取當前日期
1、利用TO_DAYS函數
select to_days(now()) - to_days('19930908')
2、利用DATEDIFF函數
select datediff(now(),'19930908')
參數1 - 參數2 等於間隔天數
select last_day(curdate()); --獲取當月最后一天。
select DATE_ADD(curdate(),interval -day(curdate())+1 day); --獲取本月第一天
select date_add(curdate()-day(curdate())+1,interval 1 month); -- 獲取下個月的第一天
select DATEDIFF(date_add(curdate()-day(curdate())+1,interval 1 month ),DATE_ADD(curdate(),interval -day(curdate())+1 day)) from dual; --獲取當前月的天數
select curtime() ---獲取當前系統 time
select sysdate()、current_timestamp()、now()、localtime()、localtimestamp() ----獲取當前系統 日期+時間
Mysql數據庫中計算兩個日期之間的時間差
1、利用TO_DAYS函數
select to_days(now()) - to_days('19930908')
2、利用DATEDIFF函數
select datediff(now(),'19930908')
參數1 - 參數2 等於間隔天數
3、利用TIMESTAMPDIFF函數
計算兩日期時間之間相差的天數，秒數，分鍾數，周數，小時數，這里主要分享的是通過MySql內置的函數 TimeStampDiff() 實現。
函數 TimeStampDiff() 是MySQL本身提供的可以計算兩個時間間隔的函數，語法為：
TIMESTAMPDIFF(unit,datetime_expr1,datetime_expr2)
返回日期或日期時間表達式datetime_expr1 和datetime_expr2the 之間的整數差。其中unit單位有如下幾種，分別是：FRAC_SECOND (microseconds), SECOND, MINUTE, HOUR, DAY, WEEK, MONTH, QUARTER, YEAR 。該參數具體釋義如下：
FRAC_SECOND 表示間隔是毫秒SECOND 秒MINUTE 分鍾HOUR 小時DAY 天WEEK 星期MONTH 月QUARTER 季度YEAR 年
例如：
#計算兩日期之間相差多少周
select timestampdiff(week,'2011-09-30','2015-05-04');
#計算兩日期之間相差多少天
select timestampdiff(day,'2011-09-30','2015-05-04');
Mysql數據庫中計算兩個日期之間的時間差
select TIMESTAMPDIFF(DAY,'2016-11-16 10:13:42',NOW());
select DATEDIFF(NOW(),'2016-11-16 17:10:52');
mysql分別獲取已有數據date中的年月日（單個提取）
select YEAR(DATE) from test; //獲取年
select day(DATE) from test; //獲取日
select month(DATE) from test; //獲取月
select DATE(CURDATE()) //獲取日期
select CONCAT(YEAR(CURDATE()),'-','01') //獲取本年第一月
mysql分別獲取已有數據date中的年月日（單個提取）
select left(signDate,7) as date from tablename
select date_format(日期字段,'%Y-%m') as '日期' from 表