mysql时间日期内置函数–非常方便用于查询今天、昨天、上周，本月，上月，年度查询等，但是千万要监控mysql语句的性能，适当加索引优化一下查询速度哦
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));
查询当前这周的数据
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,’%Y-%m-%d’)) = YEARWEEK(now());
查询上周的数据
SELECT name,submittime FROM enterprise WHERE YEARWEEK(date_format(submittime,’%Y-%m-%d’)) = YEARWEEK(now())-1;
查询当前月份的数据
select name,submittime from enterprise where date_format(submittime,’%Y-%m’)=date_format(now(),’%Y-%m’)
查询距离当前现在6个月的数据
select name,submittime from enterprise where submittime between date_sub(now(),interval 6 month) and now();
查询上个月的数据
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
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常用的内置函数
– 聚合函数
– sum avg count max min
– 时间函数
select now();
– 查询年月日 查询时间
select CURRENT_DATE;
select CURRENT_TIMESTAMP;
select CURRENT_TIME;
select SYSDATE();
– 获取utc时间
select UTC_DATE();
select UTC_TIME();
select UTC_TIMESTAMP();
– 格式化日期函数
– 计算当前时间距离某个时间的天数
select TO_DAYS(now())-TO_DAYS(‘20180710’);
select DATEDIFF(now(),‘20180710’);
select TIMESTAMPDIFF(DAY,now(),‘20180710’);
– 获取今年第一月
select CONCAT(YEAR(CURDATE()),’-’,‘01’);
– 单独获取年月日
select year(curdate());
select MONTH(curdate());
select Day(curdate());
– 从已知的日期中获取年月日
SELECT DATE_FORMAT(CURRENT_TIMESTAMP,’%y-%M-%d’);
– 从时间中分离年月日 时分秒
SELECT DATE_FORMAT(‘2019-07-11 15:21:21’,’%Y-%m-%d’);
SELECT left(‘2019-07-11 15:21:21’,10);
SELECT RIGHT(‘2019-07-11 15:21:21’,8);