mysql 查询 统计每天，每周，每月的数据

根据时间段统计每天的数据

SELECT 
			dayTb.cday '日期', 
			IFNULL(tNumTb.num,0) '人数'
		FROM (
			SELECT @cdate := DATE_ADD(@cdate, INTERVAL +1 DAY) cday
				FROM( SELECT @cdate := DATE_ADD('2021-05-10', INTERVAL -1 DAY) FROM t_customer) t0
				WHERE date(@cdate) <= DATE_ADD('2021-05-30', INTERVAL -1 DAY)
		) dayTb
		LEFT JOIN(
			SELECT date(t.CREATE_DATE) cday,count(t.CUSTOMER_ID) num FROM t_customer t
				WHERE t.CREATE_DATE >='2021-03-10'
				GROUP BY cday
		) tNumTb ON tNumTb.cday = dayTb.cday

根据年份统计每月数据

select
			sum(case month(CREATE_DATE) when '1' then 1 else 0 end) as Jan,
			sum(case month(CREATE_DATE) when '2' then 1 else 0 end) as Feb,
			sum(case month(CREATE_DATE) when '3' then 1 else 0 end) as Mar,
			sum(case month(CREATE_DATE) when '4' then 1 else 0 end) as Apr,
			sum(case month(CREATE_DATE) when '5' then 1 else 0 end) as May,
			sum(case month(CREATE_DATE) when '6' then 1 else 0 end) as June,
			sum(case month(CREATE_DATE) when '7' then 1 else 0 end) as July,
			sum(case month(CREATE_DATE) when '8' then 1 else 0 end) as Aug,
			sum(case month(CREATE_DATE) when '9' then 1 else 0 end) as Sept,
			sum(case month(CREATE_DATE) when '10' then 1  else 0 end) as Oct,
			sum(case month(CREATE_DATE) when '11' then 1  else 0 end) as Nov,
			sum(case month(CREATE_DATE) when '12' then 1  else 0 end) as Dece
		from t_customer
		where year(CREATE_DATE)= '2021';

今天的数据

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

近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 表名 WHERE PERIOD_DIFF( date_format( now( ) , '%Y%m' ) , date_format( 时间字段名, '%Y%m' ) ) =1

查询上季度数据

select * from 表名 where QUARTER(时间字段)=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

查询距离当前现在6个月的数据

select * from 表名 where 时间字段 between date_sub(now(),interval 6 month) and now();

查询某一天中每个小时的数量, 如果某个时间段没有数据, 就填充 0.

select a.order_hour as order_hour, ifnull(b.num, 0) as num 
from (
 SELECT 0 AS order_hour UNION ALL SELECT 1 AS order_hour UNION ALL
 SELECT 2 AS order_hour UNION ALL SELECT 3 AS order_hour UNION ALL 
 SELECT 4 AS order_hour UNION ALL SELECT 5 AS order_hour UNION ALL 
 SELECT 6 AS order_hour UNION ALL SELECT 7 AS order_hour UNION ALL 
 SELECT 8 AS order_hour UNION ALL SELECT 9 AS order_hour UNION ALL 
 SELECT 10 AS order_hour UNION ALL SELECT 11 AS order_hour UNION ALL 
 SELECT 12 AS order_hour UNION ALL SELECT 13 AS order_hour UNION ALL 
 SELECT 14 AS order_hour UNION ALL SELECT 15 AS order_hour UNION ALL 
 SELECT 16 AS order_hour UNION ALL SELECT 17 AS order_hour UNION ALL 
 SELECT 18 AS order_hour UNION ALL SELECT 19 AS order_hour UNION ALL 
 SELECT 20 AS order_hour UNION ALL SELECT 21 AS order_hour UNION ALL 
 SELECT 22 AS order_hour UNION ALL SELECT 23 AS order_hour 
) as a
LEFT JOIN 
(
	SELECT HOUR(CREATED_TIME) AS order_hour, count(ID) AS num FROM dd_dealtask_record 
  WHERE CREATED_TIME >= str_to_date('2023-02-17 00:00:00','%Y-%m-%d %T')    
  AND CREATED_TIME <= str_to_date('2023-02-17 23:59:59','%Y-%m-%d %T')   
  GROUP BY order_hour
) b ON a.order_hour=b.order_hour
ORDER BY order_hour;