DATE(create_time) createTimeFROMrd_track_infoGROUPBYDATE(create_time)ORDERBYDATE(create_time)DESC;/*按周统计*/SELECTcount(id) countNum, WEEK(create_time) createTimeFROMrd_track_infoGROUPBYWEEK(create_time)ORDERBYWEEK(create_time)DESC;/*按月统计*/SELECTcount(id) countNum,MONTH(create_time) cr...
我们可以使用CONCAT函数将年份和月份拼接成一个字符串,并将其作为分组字段。 SELECTCONCAT(YEAR(order_date),'-',LPAD(MONTH(order_date),2,'0'))ASmonth,SUM(amount)AStotal_amountFROMordersGROUPBYCONCAT(YEAR(order_date),'-',LPAD(MONTH(order_date),2,'0'))ORDERBYYEAR(order_date),MONTH(order_date...
YEAR 类型是一个单字节类型,用于表示年,在存储时只需要 1 个字节。可以使用各种格式指定 YEAR,如下所示: 以4 位字符串或者 4 位数字格式表示的 YEAR,范围为 '1901'～'2155'。输入格式为 'YYYY' 或者 YYYY,例如,输入 '2010' 或 2010,插入数据库的值均为 2010。 以2 位字符串格式表示的 YEAR,范围为 '...
SELECT id, quarter(FROM_UNIXTIME(my_time)) FROM mytable; 查询 本季度的数据: SELECT * FROM mytable WHERE quarter(FROM_UNIXTIME(my_time)) = quarter(curdate()); 本月统计: select * from mytable where month(my_time1) = month(curdate()) and year(my_time2) = year(curdate()) 本周统...
Date: September 17, 2011 07:29AM Hello. 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!
在MongoDB中不同的查询操作符对于null值处理方式不同。 本文提供了使用mongo shell中的db.collection.f...
按天select DATE_FORMAT(create_time,'%Y%m%d') days,count(caseid) count from tc_case group by days; 按小时 select DATE_FORMAT(create_time,'%Y%m%d%H') hours,count(caseid) count from tc_case group by hours; DATE_FORMAT方法说明 格式:DATE_FORMAT(date,format) 根据format字符串格式化date值。
SELECTFROM_UNIXTIME(UNIX_TIMESTAMP());SELECTEXTRACT(YEAR_MONTHFROMCURRENT_DATE);SELECTEXTRACT(DAY_SECONDFROMCURRENT_DATE);SELECTEXTRACT(HOUR_MINUTEFROMCURRENT_DATE); 返回两个日期值之间的差值(月数): 代码语言:javascript 复制 SELECTPERIOD_DIFF(200302,199802); ...
内置函数:DATE_FORMAT(),DATE(),WEEK(),MONTH(),YEAR(),QUARTER() 按天查询 #方法一SELECTDATE(create_time)createTime,SUM(amount)amountFROMPf_BondW_Invt_ListGROUPBYDATE(create_time)ORDERBYDATE(create_time)#方法二SELECTdate_format(create_time,'%Y-%m-%d')create_time,SUM(amount)amountFROMPf_Bond...
Date: September 17, 2011 07:29AM Hello. 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!