GROUP BY day; 或者使用 SELECT DATE_FORMAT(created_at, '%Y-%m-%d') AS day, COUNT(*) FROM your_table GROUP BY day; 按周(Weekly) 为了得到每周的数据,我们可以使用WEEK函数配合YEARWEEK格式。 SELECT YEARWEEK(created_at) AS week, COUNT(*) FROM your_table GROUP BY week; 按月(Monthly) 每月的...
WEEK(create_time) createTimeFROMrd_track_infoGROUPBYWEEK(create_time)ORDERBYWEEK(create_time)DESC;/*按月统计*/SELECTcount(id) countNum,MONTH(create_time) createTimeFROMrd_track_infoGROUPBYMONTH(create_time)ORDERBYMONTH(create_time)DESC;/*按季度统计*/SELECTcount(id) countNum, QUARTER(create_time...
SELECT NOW()#获取当前日期和时间 SELECT WEEK(NOW())#返回日期为一年中的第几周 SELECT YEAR(NOW())#返回日期的年份 SELECT HOUR(NOW())#返回时间的小时数 SELECT MINUTE(NOW())#返回时间的分钟数 SELECT DATEDIFF(NOW(),'2020-8-8')#返回两个日期之间的相隔的天数 SELECT ADDDATE(NOW(),100)#计算日...
Notice how this is treating 07:07 as 'yesterday'. So, use that LEFT(...) in your GROUP BY. This is a "straight forward" way to do intervals of 1 year, 1 month, 1 day, 1 hour (and a few others). However it will not work easily for an interval of 1 week, or 1 quarter or...
FRAC_SECOND表示间隔是毫秒, SECOND秒, MINUTE分钟, HOUR小时, DAY天, WEEK星期, MONTH月,QUARTER季度, YEAR年. 时间单位为天也可以使用上面的 to_days 函数 count() select count(number=1 and color = 'red' or NULL) from table; 1. or Null 不可省略, 当 number=1 and color = 'red' 条件无匹配...
hour as zhi,count(enrol_date) num from ( select enrol_date,case when HOUR(enrol_date) REGEXP '[13579]$' THEN HOUR(enrol_date)+1 else HOUR(enrol_date)+2 END hour from user where enrol_date BETWEEN '2019-09-24 00:00:00' and '2019-09-24 23:59:00') as a GROUP BY zhi ) ...
ORDER BY `hour` 本周日期列表 SELECT @a :=@a + 1 as `index`, DATE(ADDDATE(CURRENT_DATE, INTERVAL @a DAY)) AS `date` FROM mysql.help_topic,(SELECT @a := 0) temp WHERE @a < 6 - WEEKDAY(CURRENT_DATE) UNION SELECT @s :=@s - 1 as `index`, DATE(DATE_SUB(CURRENT_DATE, ...
mysql_query("UPDATE tablename SET date = DATE_ADD(DATE(NOW() + INTERVAL 1 WEEK), INTERVAL 17 HOUR), INTERVAL 30 MINUTE) WHERE idevent = '2'") or die(mysql_error()); 我想添加7天的日期,但有时间方面的datetime手动设置。我有上面的代码,它的工作时间为一小时,但只要我添加分钟,它就会错误地...
设置周起始日:通过设置MySQL的week_start参数来定义一周的起始日。 应用场景 日历应用:在日历应用中,经常需要计算某一天所在周的起始日期。 报表生成:在生成周报表时,需要确定每张报表所涵盖的周的起始日期。 数据分析:在进行时间序列数据分析时,可能需要按周进行数据分组。 解决问题的方法 假设我们需要获取当前日期所...
WHERE `timestamp` BETWEEN CURDATE()-INTERVAL 1 WEEK AND NOW() and sensor = 'DO' GROUP BY DATE(`timestamp`), HOUR(`timestamp`) WITH ROLLUP The above result would be: SW01 DO 29.Dec 00:00 2018-12-29 00:10:07 11.144020300000001 ...