Find Upper and Lower Values Based On middle?

Question

I have a query...
which gives output like.
empcd at_date status
SA0477 1-AUG-2007 A
SA0477 2-AUG-2007 P
SA0477 3-AUG-2007 P
SA0477 4-AUG-2007 A
SA0477 5-AUG-2007 WO
SA0477 6-AUG-2007 A
SA0477 7-AUG-2007 P
SA0477 8-AUG-2007 P
SA0477 9-AUG-2007 P
SA0477 10-AUG-2007 A
SA0477 11-AUG-2007 A
SA0477 12-AUG-2007 WO
SA0477 13-AUG-2007 A
but i want those record, where 'WO' between two 'A'.means.
i want
SA0477 4-AUG-2007 A
SA0477 5-AUG-2007 WO
SA0477 6-AUG-2007 A
and
SA0477 11-AUG-2007 A
SA0477 12-AUG-2007 WO
SA0477 13-AUG-2007 A
record if there r any solution plsz rply. ASAP.
thanx wating for ur rply.

Answer 1

check this..
SQLPLUS> with test_tab as(
  2  SELECT 'SA0477' empcd,to_date('1-AUG-2007','dd-MON-yyyy') at_date, 'A' status from dual union all
  3  SELECT 'SA0477', to_date('2-AUG-2007','dd-MON-yyyy'),'P' from dual union all
  4  SELECT 'SA0477', to_date('3-AUG-2007','dd-MON-yyyy'),'P' from dual union all
  5  SELECT 'SA0477', to_date('4-AUG-2007','dd-MON-yyyy'),'A' from dual union all
  6  SELECT 'SA0477', to_date('5-AUG-2007','dd-MON-yyyy'),'WO' from dual union all
  7  SELECT 'SA0477', to_date('6-AUG-2007','dd-MON-yyyy'),'A' from dual union all
  8  SELECT 'SA0477', to_date('7-AUG-2007','dd-MON-yyyy'),'P' from dual union all
  9  SELECT 'SA0477', to_date('8-AUG-2007','dd-MON-yyyy'),'P' from dual union all
10  SELECT 'SA0477', to_date('9-AUG-2007','dd-MON-yyyy'),'P' from dual union all
11  SELECT 'SA0477', to_date('10-AUG-2007','dd-MON-yyyy'),'A' from dual union all
12  SELECT 'SA0477', to_date('11-AUG-2007','dd-MON-yyyy'),'A' from dual union all
13  SELECT 'SA0477', to_date('12-AUG-2007','dd-MON-yyyy'),'WO' from dual union all
14  SELECT 'SA0477', to_date('13-AUG-2007','dd-MON-yyyy'),'A' from dual)
15  , test_tab2 as(
16  select a.*,
17  case
18   when status ='A' and lead( status ,1) over (partition by empcd order by at_date) = 'WO'  Then
19       '1'
20   when status ='A'   and lag( status ,1) over (partition by empcd order by at_date) = 'WO'  Then
21      '1'
22   when status='WO' then
23     '1'
24   else
25      '0'
26  end flag
27  from test_tab a)
28  select empcd,at_date,status from test_tab2 where flag='1';
EMPCD  AT_DATE   ST
SA0477 04-AUG-07 A
SA0477 05-AUG-07 WO
SA0477 06-AUG-07 A
SA0477 11-AUG-07 A
SA0477 12-AUG-07 WO
SA0477 13-AUG-07 A
6 rows selected.
Elapsed: 00:00:00.00Good Luck