1. 統計近7日的資料 sql

SELECT 
  days.createTime createTime ,
  nvl (m.COUNT, 0) count 
FROM
  (SELECT 
    to_char (SYSDATE- LEVEL + 1, 'yyyy-mm-dd') createTime  
  FROM
    DUAL connect BY LEVEL <= 7) days 
  LEFT JOIN 
    (SELECT 
      to_char (HEALTH_USER.CREATE_DATE, 'yyyy-mm-dd') createTime,
      nvl (COUNT(HEALTH_USER.ID), 0) count 
    FROM
      HEALTH_USER  
      
    GROUP BY to_char (HEALTH_USER.CREATE_DATE, 'yyyy-mm-dd')) m

    ON days.createTime  = m.createTime 
GROUP BY days.createTime , m.count  
ORDER BY days.createTime 

2.統計一年中每個月的資料

select
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'01',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums01,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'02',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums02,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'03',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums03,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'04',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums04,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'05',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums05,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'06',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums06,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'07',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums07,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'08',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums08,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'09',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums09,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'10',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums10,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'11',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums11,
sum(decode(to_char(HEALTH_USER.CREATE_DATE,'mm'),'12',NVL(COUNT(HEALTH_USER.ID), 0),0)) nums12
from
HEALTH_USER
where
to_char(HEALTH_USER.CREATE_DATE,'yyyy')='2018' AND HEALTH_USER.STATION_ID='330965C6BAEE4DD58513D4DC229FF1A0'
GROUP BY 
to_char(HEALTH_USER.CREATE_DATE,'mm'),'01',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'02',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'03',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'04',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'05',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'06',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'07',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'08',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'09',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'10',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'11',
to_char(HEALTH_USER.CREATE_DATE,'mm'),'12'