select count(*),t.分组字段 from (
select t.* ,to_char(t.时间,"HH24") stime,to_char(t.时间,"HH24mi") fz,to_char(时间,"d")
from A t
where 时间>=to_date("2019-12-01","yyyy-MM-dd") and ghsj<=to_date("2019-12-31","yyyy-MM-dd") and to_char(时间,"d")="2"
) where stime in ("08","09","10","11","12") and fz>=0800 a
group by T.分组字段
to_char(时间,"d") 取当前时间是星期几 每星期第一天为周日
to_char(t.时间,"HH24mi") 取当前时间的小时分
o_char(t.时间,"HH24") 取当前时间的小时
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版权声明：本文为CSDN博主「陈小妖」的原创文章，遵循 CC 4.0 BY-SA 版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/chenxiaojie_26/article/details/103823260
