1.根据时间格式化出年,月,日
SELECT NOW(); ##now()表示当前系统时间(YYYY-MM-DD HH:mm:ss)2020-05-31 21:51:01
SELECT DATE_FORMAT(now(),'%Y-%m-%d'); ##DATE_FORMAT(date,format)格式化date时间格式(YYYY-MM-DD)
SELECT DATE_FORMAT(now(),'%Y-%m'); ##DATE_FORMAT(date,format)格式化date时间格式(YYYY-MM)
SELECT DATE_FORMAT(now(),'%Y'); ##DATE_FORMAT(date,format)格式化date时间格式(YYYY)
2,求两列的时间差
select TIMESTAMPDIFF(SECOND, '2018-03-20 09:00:00', '2018-03-22 10:00:00'); ##返回相差分钟数
select TIMESTAMPDIFF(MINUTE, '2018-03-20 09:00:00', '2018-03-22 10:00:00'); ##返回相差分钟数
select TIMESTAMPDIFF(HOUR, '2018-03-20 09:00:00', '2018-03-22 10:00:00'); ##返回相差分钟数
select TIMESTAMPDIFF(DAY, '2018-03-20 09:00:00', '2018-03-28 10:00:00'); ##返回相差分钟数
select TIMESTAMPDIFF(MONTH, '2018-03-20 09:00:00', '2018-11-01 10:00:00'); ##返回相差分钟数
select TIMESTAMPDIFF(YEAR, '2018-03-20 09:00:00', '2020-03-22 10:00:00'); ##返回相差分钟数
TIMESTAMPDIFF 计算时间差函数
SECOND 秒 SECONDS
MINUTE 分钟 MINUTES
HOUR 时间 HOURS
DAY 天 DAYS
MONTH 月 MONTHS
YEAR 年 YEARS
3.常用的时间区间,日,周,月,季度,年
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
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’ )
上一月 SELECT * FROM 表名 WHERE PERIOD_DIFF( date_format( now( ) , ‘%Y%m’ ) , date_format( 时间字段名, ‘%Y%m’ ) ) =1
查询本周记录
select * from ht_invoice_information where WEEKOFYEAR(create_date)=WEEKOFYEAR(NOW());
#查询上周记录
select * from ht_invoice_information where create_date>=date_add(now(),interval -(8 + weekday(now())) day)
and create_date<=date_add(now(),interval -(1 + weekday(now())) day);
#或者
select * from `ht_invoice_information` where WEEKOFYEAR(create_date)=WEEKOFYEAR(DATE_SUB(now(),INTERVAL 1 week));
#查询本月数据
select * from ht_invoice_information where MONTH(create_date)=MONTH(NOW()) and year(create_date)=year(now());
#查询上月数据
select * from ht_invoice_information where create_date<=last_day(date_add(now(),interval -1 MONTH))
and create_date>=DATE_FORMAT(concat(extract(year_month from date_add(now(),interval -1 MONTH)),’01′),’%Y-%m-%d’);
#或者
select * from `ht_invoice_information` where MONTH(create_date)=MONTH(DATE_SUB(NOW(),interval 1 month))
and year(create_date)=year(now());
#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));
参考:https://blog.csdn.net/icefan02/article/details/84550148博客