實際查詢中，可能會出現將某些查詢結果值顯示在列位置上，此時可之直接通過sql語句進行處理：
1. 方法-：使用sql的函式轉換：
select aa.po_no,aa.po_line,
nvl((case when aa.group_name='re' then aa.qty end),0) as re,
nvl((case when aa.group_name='sh' then aa.qty end),0) as sh,
nvl((case when aa.group_name='pa' then aa.qty end),0) as pa,
nvl((case when aa.group_name='we' then aa.qty end),0)as we
from (select s.po, s.line, s.group_name, count(*) as qty
from table1 s, table2 v1
where v.po = s.po and v.po = s.line and s.group_name in ('re', 'sh', 'pa', 'we')
and v1.date between to_date('20100605', 'yyyymmdd') and
to_date('20100607', 'yyyymmdd'))aa
2. 方法=：直接通過串表得到：
select v.po,v.line,
(select count(*)
from table1 s
where v.po = s.po and v.po = s.line
and s.group_name ='sh') as sh,
(select count(*)
from table1 s
where v.po = s.po and v.po = s.line
and s.group_name ='re') as re,
(select count(*)
from table1 s
where v.po = s.po and v.po = s.line
and s.group_name ='pa') as pa,
(select count(*)
from table1 s
where v.po = s.po and v.po = s.line
and s.group_name ='we') as we,
from table2 v
where v.date between to_date('20100605', 'yyyymmdd') and to_date('20100607', 'yyyymmdd')
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