获得本周截止到当前为止，所有用户的签到次数

select t.usermobile,
       themeId,
       to_char(trunc(sysdate, 'iw'), 'yyyy-mm-dd') begintime,
       to_char(trunc(sysdate, 'iw') + 6, 'yyyy-mm-dd') endtime,
       count(distinct t.attenddate) countOfAttendance
  from user_attendance t
 where attenddate >= to_char(trunc(sysdate, 'iw'), 'yyyy-mm-dd')
   and attenddate <= to_char(sysdate, 'yyyy-mm-dd')
 group by usermobile, themeid;

表结构
create table USER_ATTENDANCE
(
  ID         NUMBER(9) not null,
  USERMOBILE VARCHAR2(15) not null,
  THEMEID    NUMBER(9),
  ATTENDDATE VARCHAR2(19) not null
)