oracle 统计最近七天的数据

SELECT t1.DAY,(case when t2.day=t1.day then t2.num else t1.num end) countNum
FROM (
    select to_char(sysdate-level+1,'yyyy-mm-dd') DAY,0 NUM from dual CONNECT by level<=7
) t1
LEFT JOIN
(
    SELECT COUNT(1) NUM,   TO_CHAR(add_time,'YYYY-MM-DD') DAY
    FROM T_AQJB
    WHERE  TO_CHAR(add_time,'YYYY-MM-DD') <=  TO_CHAR(SYSDATE,'YYYY-MM-DD') AND    TO_CHAR(add_time,'YYYY-MM-DD') >= TO_CHAR(SYSDATE-6,'YYYY-MM-DD')
    GROUP BY TO_CHAR(add_time,'YYYY-MM-DD')
)t2 ON T2.DAY=T1.DAY
ORDER BY t1.DAY DESC

 

假如要统计周一到周日。

select
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 1,'yyyy-mm-dd')) then 1 else 0 end) ) c_mon,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 2,'yyyy-mm-dd')) then 1 else 0 end) ) c_tue,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 3,'yyyy-mm-dd')) then 1 else 0 end) ) c_wed,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 4,'yyyy-mm-dd')) then 1 else 0 end) ) c_thu,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 5,'yyyy-mm-dd')) then 1 else 0 end) ) c_fri,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 6,'yyyy-mm-dd')) then 1 else 0 end) ) c_sat,
   (sum( case when (to_char(CREATE_TIME,'yyyy-mm-dd')) =(to_char(trunc(sysdate, 'd') + 7,'yyyy-mm-dd')) then 1 else 0 end) ) c_sun

from 表名