Need to resolve this tricky query

Question

Dear friends,
I just come accross a problem which I need to be resolved on high priority. Well I have following table structures for a doctor database.
Table1 : Doctor Master     
Doctor ID...............Doctor Name
1...............................Ali
2...............................Saleem
3...............................Arshad
Table2 : mst_flex_field     
Master_Key_ID.........Master Key Value
1..............................Qualifications
2..............................Specility
3..............................Magazine
4..............................Affiliation
Table3: mst_flex_field_Value     
Flex Field Id...............Master_Key_ID............Flex Field Value
1......................................1..............................BDS     
2......................................1..............................DTCD     
3......................................1..............................FRCOG     
4......................................1..............................MCPS     
5......................................1..............................MD     
6......................................1..............................MBBS     
7......................................1..............................DABM     
8......................................1..............................FRCP     
9......................................1..............................MRC OG     
10....................................2..............................ANST.
11....................................2..............................FOREMED     
12....................................2..............................NEPHROLOGISTS     
13....................................2..............................RHEUMATOLOGIST     
14....................................2..............................CARDIOLOGIST     
15....................................2..............................G.P     
16....................................3..............................PROF MAG     
17....................................3..............................ARTHOPY     
Table4: Doctor Detail Table          
Detail Table Id.......Doctor id.........Flex Field Id
1..............................1.....................6
2..............................1.....................2
3..............................1.....................3
4..............................1.....................16
5..............................1.....................17
6..............................1.....................15
7..............................2.....................10
8..............................     2.....................6
9..............................     2.....................8
10............................3.....................1
11............................3.....................10
12............................3.....................11
13............................3.....................17
Output Required for this structure.
Out Put
Doctor ID....Doc Name........Qualifications.............Specility..........Magazine
1..............Ali.......................MBBS.......................G.P................PROF MAG
1..............Ali.......................DTCD..............................................ARTHOPY
1..............Ali.......................FRCOG
2..............Saleem................MBBS.......................ANST.
2..............Saleem................FRCP
3..............Arshad.................BDS.......................ANST.................ARTHOPY
3..............Arshad..............................................FOREMED
One thing more I would like to make view of that query.
Best Regards,
Shah

Answer 1

Dear guys,
I finally got the solution of my problem.
Below is the solution.
select doctor_id,
coalesce( rn1, rn2, rn5 , rn6 , rn7 ) rn,
max(Qualification) "Qualification",
max(Speciality) "Speciality",
max(Personal_Hobbies) "Personal_Hobbies",
max(Professional_Interest) "Professional_Interest",
max(Designation) "Designation"
from (
select t.doctor_id,
decode (t.mst_key_id , 1 , t.rn , null) rn1,
decode (t.mst_key_id , 1 , t.flex_field_value_id) Qualification,
decode (t.mst_key_id , 2 , t.rn , null) rn2,
decode (t.mst_key_id , 2 , t.flex_field_value_id) Speciality,
decode (t.mst_key_id , 5 , t.rn , null) rn5,
decode (t.mst_key_id , 5 , t.flex_field_value_id) Personal_Hobbies,
decode (t.mst_key_id , 6 , t.rn , null) rn6,
decode (t.mst_key_id , 6 , t.flex_field_value_id) Professional_Interest,
decode (t.mst_key_id , 7 , t.rn , null) rn7,
decode (t.mst_key_id , 7 , t.flex_field_value_id) Designation
from (
select d.doctor_id , v.mst_key_id , v.flex_field_value_id,
row_number() over ( partition by d.doctor_id, v.mst_key_id
order by v.mst_key_id ) rn
from mst_doctor_other_info d,
mst_flex_field_values v
where d.flex_field_value_id = v.flex_field_value_id
-- and d.doctor_id in ( 1 , 2 , 3)
) t
group by doctor_id,
coalesce( rn1, rn2, rn5 , rn6 , rn7 )
order by 1, 2
Thanks everybody for the generous help.
Best Regards,
Shah