SELECT count(id) countNum, DATE(create_time) createTime FROM rd_track_info GROUP BY DATE(create_time) ORDER BY DATE(create_time) DESC; /*按周统计*/ SELECT count(id) countNum, WEEK(create_time) createTime FROM rd_track_info GROUP BY WEEK(create_time) ORDER BY WEEK(create_time) DESC...
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...
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...
语法:TIMESTAMPDIFF(interval,datetime1,datetime2),比较的单位interval可以为以下数值: 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) ...
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 ) ...
=2007 group by weekflg 每月 SQL codeselect count(*) as cnt,month(editdate) as monthflg from projects where year (editdate)=2007 group by monthflg 每天 SQL codeselect count(*) as cnt from projects group by date(editdate) mysql中DATE_FORMAT(date, format)函数可根据format字符串格式化日期或...
SET @@global.week_start = 1; SET @@session.week_start = 1; 这里的week_start参数的值1表示星期一为一周的开始,0表示星期日为一周的开始。 参考链接 MySQL DATE_SUB() 函数 MySQL DAYOFWEEK() 函数 MySQL 设置周起始日 请注意,以上SQL语句和设置可能因MySQL版本的不同而有所差异,具体使用时请参考你所...
HOUR(time)功能:返回时间的小时。 MINUTE(time)功能:返回时间的分钟。 SECOND(time)功能:返回时间的秒。 WEEK(date, mode)功能:返回日期对应的周序号。 WEEKDAY(date)功能:返回日期是星期几,0表示星期一,1表示星期二,以此类推。 DAYOFWEEK(date)功能:返回日期是星期几,1表示星期日,2表示星期一,以此类推。
SELECT EXTRACT(HOUR FROM transaction_time) AS transaction_hour, SUM(product_price * quantity_sold) AS total_sales_value, COUNT(product_id) AS total_sales_count FROM sales_transactions GROUP BY transaction_hour ORDER BY transaction_hour; 2. 计算销售额的年度增长率 我们希望了解产品销售额的年度增长...
I would like to group data according to hour, day, weekday, week, month and year based on one date column. My other problem is that I want to calculate data from 4am the first day till 3.59am the last day! For example, the query for a week should be retrieve data from Monday 4am...