oracle 取某个时间段的数据(每周几的上午几点到几点)

oracle 取某个时间段的数据,具体代码如下所示: 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','1