Multi sub-select query help

Question

Hello:
I need to write a query which identifies the patients who exist in the master table for a given organization and trait and do not exist in the final table.
For example, for organization 499 and trait 43926, I have a total of 119 patients. After some processing, out of these 119 patients, only 106 patients get inserted into the final_traits table.
This leaves us with a difference of 13 patients. I want a query that will give me this list of 13 patients.
In order to achieve this, I need to use three tables:
1.     Master_traits which contains the entire patient population. The field needed from this table is dwkey_patient.
2.     Patient which contains the demographic info. The three fields needed from this table are dwkey_patient, patient_key, and name.
3.     Final_traits which contains the detail trait info. The field needed from here is patient_key.
To retrieve the 119 patients along with their names, the first join needs to be between “master_traits” and “patient” using the dwkey_patient field.
From these 119 patients, to determine which ones did NOT get inserted into the final_traits table, the second join will be between “patient” and “final_traits” using the patient_key field. This should give me 13 patients.
So far, I have the portion of the query which gives me the total population of 119.
select a.dwkey_patient, b.patient_key, b.name
from master_traits a, patient b
where a.dwkey_patient = b.dwkey_patient
and a.dwkey_org = 499
and a.dwkey_approval > 0
and a.dwkey_traittype = 43926
and a.out_of_range is null
order by dwkey_patient asc;
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I am having a tough time getting the second portion of the query to show me the 13 patients who were not inserted.
Can someone help?
Thanks.                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

Answer 1

Well,
It works for me...
MHO%xe> with master_traits as
  2  ( select 1234 dwkey_patient from dual union all
  3  select 2345 from dual union all
  4  select 3456 from dual union all
  5  select 4567 from dual union all
  6  select 5678 from dual
  7  )
  8  , patient as
  9  ( select 1234 dwkey_patient, 900 patient_key, 'smith' name from dual union all
10   select 2345, 901, 'jones' name from dual union all
11   select 3456, 902, 'murphy' name from dual union all
12   select 4567, 903, 'brown' name from dual union all
13   select 5678, 904, 'miller' name from dual
14   )
15  , final_traits as
16  ( select 900 patient_key from dual union all
17  select 901 from dual union all
18  select 903 from dual
19  ) -- actual query starts here:
20  select a.dwkey_patient, b.patient_key, b.name
21  from   master_traits a
22     ,   patient b
23     ,   final_traits c
24   where a.dwkey_patient = b.dwkey_patient
25  --   and a.dwkey_org = 499
26  --   and a.dwkey_approval > 0
27  --   and a.dwkey_traittype = 43926
28  --   and a.out_of_range is null
29     and b.patient_key = c.patient_key(+)
30     and c.patient_key is null
31  ;
DWKEY_PATIENT PATIENT_KEY NAME
         5678         904 miller
         3456         902 murphySo, you might need to adjust your WHERE clause I commented out in above example...
MHO%xe> with master_traits as
  2  ( select 1234 dwkey_patient from dual union all
  3  select 2345 from dual union all
  4  select 3456 from dual union all
  5  select 4567 from dual union all
  6  select 5678 from dual
  7  )
  8  , patient as
  9  ( select 1234 dwkey_patient, 900 patient_key, 'smith' name from dual union all
10   select 2345, 901, 'jones' name from dual union all
11   select 3456, 902, 'murphy' name from dual union all
12   select 4567, 903, 'brown' name from dual union all
13   select 5678, 904, 'miller' name from dual
14   )
15  , final_traits as
16  ( select 900 patient_key from dual union all
17  select 901 from dual union all
18  select 903 from dual
19  )
20  select a.dwkey_patient, b.patient_key, b.name
21    from master_traits a, patient b
22   where a.dwkey_patient = b.dwkey_patient
23  --   and a.dwkey_org = 499
24  --   and a.dwkey_approval > 0
25  --   and a.dwkey_traittype = 43926
26  --   and a.out_of_range is null
27     and not exists ( select null
28                        from final_traits c
29                       where c.patient_key =  b.patient_key )
30  ;
DWKEY_PATIENT PATIENT_KEY NAME
         5678         904 miller
         3456         902 murphyWorks too (ofcourse)
Edited by: hoek on Jun 4, 2009 8:37 PM