MySQL 日期时间相关函数整理

-- 为日期增加一个时间间隔：date_add()

SELECT NOW();
SELECT DATE_ADD(NOW(),INTERVAL -1 YEAR);
SELECT DATE_ADD(NOW(),INTERVAL -1 MONTH);
SELECT DATE_ADD(NOW(),INTERVAL 28 DAY);
SELECT DATE_ADD(NOW(),INTERVAL -6 HOUR);
SELECT DATE_ADD(NOW(),INTERVAL -999 MINUTE);
SELECT DATE_ADD(NOW(),INTERVAL 23 SECOND);
SELECT DATE_ADD(NOW(),INTERVAL 2 MICROSECOND);
SELECT DATE_ADD(NOW(),INTERVAL 1 WEEK);
SELECT DATE_ADD(NOW(),INTERVAL 0 QUARTER);

-- 为日期减去一个时间间隔：date_sub()

SELECT DATE_SUB(NOW(),INTERVAL 1 YEAR);
SELECT DATE_SUB(NOW(),INTERVAL 1 MONTH);
SELECT DATE_SUB(NOW(),INTERVAL 1 DAY);
SELECT DATE_SUB(NOW(),INTERVAL 1 HOUR);
SELECT DATE_SUB(NOW(),INTERVAL 1 MINUTE);
SELECT DATE_SUB(NOW(),INTERVAL 1 SECOND);
SELECT DATE_SUB(NOW(),INTERVAL 1 MICROSECOND);
SELECT DATE_SUB(NOW(),INTERVAL 1 QUARTER);

-- 给定一个日期date，返回一个从年份为0开始的天数 ：TO_DAYS()

SELECT TO_DAYS("0000-01-01");
SELECT TO_DAYS(NOW());

-- 截取数据库某一列字段中的一部分 SUBSTR()

SELECT SUBSTR(NOW(),1,13);

-- 今天

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

-- 昨天

SELECT * FROM 表名 WHERE TO_DAYS( NOW( ) ) - TO_DAYS( 时间字段名) <= 1

-- 近7天

SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 7 DAY) <= date(时间字段名)

-- 近30天

SELECT * FROM 表名 where DATE_SUB(CURDATE(), INTERVAL 30 DAY) <= date(时间字段名)

-- 本月

SELECT * FROM 表名 WHERE DATE_FORMAT( 时间字段名, '%Y%m' ) = DATE_FORMAT( CURDATE( ) , '%Y%m' )

-- 上个月

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));

-- 查询本周数据

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now());

-- 查询上周数据

SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,'%Y-%m-%d')) = YEARWEEK(now())-1;

-- 查询上月数据

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

-- 查询本月数据

select name,submittime from enterprise   where date_format(submittime,'%Y-%m')=date_format(now(),'%Y-%m')

-- 查询距离当前时间6个月的数据

select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();

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