Populate data to column frm existing column

Question

Hi,
I need to have 3 more columns and populate data from existing column rows.
For example
I want to have new columns based on int_bckt_1, char-bckt-2 and char_bckt_3
int_bckt_1= raw score
char_bckt_2= Pref
int_bckt_2= Scaled score
Raw score, pref and sacled score columns are new.
The data is populated based on these columns int_bckt_1, char_bckt_2,int_bckt_2
The rule is - i need to populate the data based on sub test id and char-bckt_2. we need to consider sub test id=200
for english
sub test id=200 and char_back_2 =T and subject is english then i need to populate data for all subtestid 500 and subject =english
similar for Perf and Raw score
For Math
sub test id=200 and char_back_2 =T and subject is Math then i need to populate data for all subtestid 500 and subject =Math
i want to do samething for char_bckt_2 =TR too.
I herewith attached my excel sheet for more clear
Raw score, Pref, Scaled score these column is not there in the table i need to have and populate data based on rule
Could you please help me.
Thanks
Ram

Answer 1

Another interpretation:
OK, 3 new columns, so they're all null and you want to populate them and your last reply is your desired output.
If that's correct you can use CASE:
SQL> select * from t;
STUD INT_BCKT_1 CHAR_BCK INT_BCKT_2 CHAR_BC SUBJECT  SUBTESTID      SCALE      A_RAW PR
John         38 T               226 NI      English        200
John         16 T               218 WF      Math           200
John         82 reading         167 poetry  English        500
John         82 Language        166 formal  English        500
John         83 number          170 compu   Math           500
John         83 geometry        172 spatial Math           500
6 rows selected.
SQL>  
SQL> update t
  2  set scale = case when subject = 'English'
  3                   then (select int_bckt_2 from t where subject = 'English' and subtestid = 200)
  4                   when subject = 'Math'
  5                   then (select int_bckt_2 from t where subject = 'Math' and subtestid = 200)
  6              end
  7  ,   a_raw = case when subject = 'English'
  8                   then (select int_bckt_1 from t where subject = 'English' and subtestid = 200)
  9                   when subject = 'Math'
10                   then (select int_bckt_1 from t where subject = 'Math' and subtestid = 200)
11              end
12  ,   pref = case when subject = 'English'
13                   then (select char_bckt_3 from t where subject = 'English' and subtestid = 200)
14                   when subject = 'Math'
15                   then (select char_bckt_3 from t where subject = 'Math' and subtestid = 200)
16              end;
6 rows updated.
SQL>
SQL>
SQL> select * from t;
STUD INT_BCKT_1 CHAR_BCK INT_BCKT_2 CHAR_BC SUBJECT  SUBTESTID      SCALE      A_RAW PR
John         38 T               226 NI      English        200        226         38 NI
John         16 T               218 WF      Math           200        218         16 WF
John         82 reading         167 poetry  English        500        226         38 NI
John         82 Language        166 formal  English        500        226         38 NI
John         83 number          170 compu   Math           500        218         16 WF
John         83 geometry        172 spatial Math           500        218         16 WF
6 rows selected.