Urgent help needed on 1 query

Question

Hello All,
I have just started working in PL/SQL,
I need some help on 1 urgent issue.
i have a table lets say which has structure and values like below:
ID Data Key Data Value
1 Firstname X
2 Lastname Y
3 Middlename Z
but my query shd return me data having firstname ,middlenale and last name as column names and lvalues like lsited below:
Firstname Middlename Lastname
X Y Z
Please help and i really appreciate for your time and help!!!!!!!!!!
Thanks and Regards

Answer 1

Urgent? I don't think so.
However, as others have mentioned, what groups the items together so that the relationship is known between them?
SQL> ed
Wrote file afiedt.buf
  1  with t as (select 1 as id, 'Firstname' as data_key, 'Fred' as data_val from dual union all
  2             select 2, 'Surname', 'Bloggs' from dual union all
  3             select 3, 'Middlename', 'J' from dual union all
  4             select 4, 'Firstname', 'John' from dual union all
  5             select 5, 'Surname', 'Doe' from dual union all
  6             select 6, 'Middlename', 'D' from dual)
  7  --
  8  select id-decode(data_key,'Surname',1,'Middlename',2,0) as id
  9        ,max(decode(data_key,'Firstname',data_val)) as Firstname
10        ,max(decode(data_key,'Middlename',data_val)) as Middlename
11        ,max(decode(data_key,'Surname',data_val)) as Surname
12  from t
13* group by id-decode(data_key,'Surname',1,'Middlename',2,0)
SQL> /
        ID FIRSTN MIDDLE SURNAM
         1 Fred   J      Bloggs
         4 John   D      Doe
SQL>This example assumes that a Firstname, Surname and Middlename appear in that order with sequential ID's, such that the ID for Surname is always 1 more than the ID for it's associated Forename and the ID for Middlename is always 2 more than the associated Forename.