現在的需求是，出一張日報，每天傳送的是前一天的資料。
如果是週末的話，不出資料，等在週一提取上週五到這週日的資料。
實現以上功能。
現在7月14，模擬7月10號的狀況
交易表資料
with invest as
 (select to_date('20170702', 'yyyymmdd') + level dt, level + 100 tranam
    from dual
  connect by level <= trunc(sysdate) - to_date('20170702', 'yyyymmdd'))
       
 select * from invest 
      
       DT              TRANAM
----------- ----------
2017/7/3           101
2017/7/4           102
2017/7/5           103
2017/7/6           104
2017/7/7           105
2017/7/8           106
2017/7/9           107
2017/7/10          108
2017/7/11          109
2017/7/12          110
2017/7/13          111
2017/7/14          112
12 rows selected
with invest as
 (select to_date('20170702', 'yyyymmdd') + level dt, level + 100 tranam
    from dual
  connect by level <= trunc(sysdate) - to_date('20170702', 'yyyymmdd'))
select *
  from invest
 where dt between (case
         when to_char(sysdate - 4, 'd') in ('2') then
          trunc(sysdate - 4) - 3
         else
          trunc(sysdate - 4)-1
       end) and 
      ( case
         when to_char(sysdate - 4, 'd') in ('2') then
          trunc(sysdate - 4) - 1
         else
          trunc(sysdate-4)-1
       end);
     
 

DT              TRANAM
----------- ----------
2017/7/7           105
2017/7/8           106
2017/7/9           107



7月11的時候是星期二：傳送的資料應該是前一天的資料10號的
with invest as
 (select to_date('20170702', 'yyyymmdd') + level dt, level + 100 tranam
    from dual
  connect by level <= trunc(sysdate) - to_date('20170702', 'yyyymmdd'))
select *
  from invest
 where dt between (case
         when to_char(to_date('20170711','yyyymmdd') - 3, 'd') in ('2') then
         to_date('20170711','yyyymmdd') - 3
         else
          to_date('20170711','yyyymmdd')-1
       end) and 
      ( case
         when to_char(to_date('20170711','yyyymmdd') - 3, 'd') in ('2') then
          to_date('20170711','yyyymmdd')- 1
         else
          to_date('20170711','yyyymmdd')-1
       end)
DT              TRANAM
----------- ----------
2017/7/10          108