Query construction issues...

Question

So what i'm trying to do is output a single row for each person_id. Additionally, if a person_id has a type_id of 1 then i would like a column to output 'YES' otherwise 'NO' and the same goes for type_id of 0.
Oracle version: 10.2G
Content of TableX
        PERSON_ID     NAME     TYPE_ID
     200839             Bob                0
     200839             Bob                1
     200839              Bob     
     200874            Chris               1
     200811             Mike               1
     200893             James               0
     200877             Nick     
     200877             Nick              1
     200001             Terry     
Desired Output:
        PERSON_ID     NAME     ID_0     ID_1
     200839             Bob            YES     YES
     200874             Chris            NO     YES
     200811             Mike            NO     YES
     200893             James              YES     NO
     200877              Nick           NO     YES
     200001             Terry             NO     NO
Current Query
   with xtable as
   (select 200839 person_id, 'Bob' name, 0 type_id from dual union all
     select 200839, 'Bob',1 from dual union all
     select 200839, 'Bob',null from dual union all
      select 200874, 'Chris',1 from dual union all
       select 200811, 'Mike',1 from dual union all
        select 200893, 'James',0 from dual union all
        select 200877, 'Nick',null from dual union all
          select 200877, 'Nick',1 from dual union all
         select 200001, 'Terry',null from dual)
   select
         person_id,
         name,
         case
             when type_id = 0  then
                  'YES'
              else
                  'NO'
         end as id_0,
         case
             when type_id = 1 then
                  'YES'
             else
                  'NO'
         end as id_1
   from
   select person_id,
          name,
          type_id,
          count(*) over (partition by person_id) as total
    from   xtable
    )I'm pretty much stuck at the query above.
Edited by: user652714 on May 5, 2010 12:31 PM

Answer 1

Once you use the case/decode, you get one row for each Id, name and type combination. You'll then need to group them by ID, Name to get the data output as you need.
  1  with xtable as
  2     (select 200839 person_id, 'Bob' name, 0 type_id from dual union all
  3       select 200839, 'Bob',1 from dual union all
  4       select 200839, 'Bob',null from dual union all
  5        select 200874, 'Chris',1 from dual union all
  6         select 200811, 'Mike',1 from dual union all
  7          select 200893, 'James',0 from dual union all
  8          select 200877, 'Nick',null from dual union all
  9            select 200877, 'Nick',1 from dual union all
10           select 200001, 'Terry',null from dual)
11  select person_id,
12         name,
13         max(decode(type_id,0,'YES')) T0,
14         max(decode(type_id,1,'YES')) T1
15    from xtable
16*   group by person_id, name
sql> /
PERSON_ID NAME  T0  T1
    200874 Chris     YES
    200877 Nick      YES
    200001 Terry
    200893 James YES
    200839 Bob   YES YES
    200811 Mike      YESUsing NVL.... to the above query, you can get it in the required format that you need. Of course, you can use case instead of decode too.
  1  with xtable as
  2     (select 200839 person_id, 'Bob' name, 0 type_id from dual union all
  3       select 200839, 'Bob',1 from dual union all
  4       select 200839, 'Bob',null from dual union all
  5        select 200874, 'Chris',1 from dual union all
  6         select 200811, 'Mike',1 from dual union all
  7          select 200893, 'James',0 from dual union all
  8          select 200877, 'Nick',null from dual union all
  9            select 200877, 'Nick',1 from dual union all
10           select 200001, 'Terry',null from dual)
11  select person_id,
12         name,
13         nvl(max(decode(type_id,0,'YES')),'NO') T0,
14         nvl(max(decode(type_id,1,'YES')),'NO') T1
15    from xtable
16*   group by person_id, name
sql> /
PERSON_ID NAME  T0  T1
    200874 Chris NO  YES
    200877 Nick  NO  YES
    200001 Terry NO  NO
    200893 James YES NO
    200839 Bob   YES YES
    200811 Mike  NO  YES