Help with Creating a View

Question

Dear Experts,
I need to create two derived fields in the View.Iam a Newbie.
I initially created a View from a Table. How should I go about
creating the Derived columns?
Column 1 In The Table Contains an ID.
Derived Column in the View Must be having the following
Condition.
1) ID in table =
14853 AMS
10511 AMS
13625 AMS
8245 AMS
12675 AMS
Derived Column1 (Code) in the view must See If the Value in the
ID as AMS if the part of the value in ID is AMS it must be
Populated AMS in the Derived field else it must be set to PVT
2) One More Column with another Derived Condition
ID in the Table
13449 AMS
12196 AMS
5055 AMS
13647 AMS
6927 AMS
19243 AMS
6057 AMS
703 AMS
29 AMS
Resultant Derived Column2 (RNO) must be a 8 Digit field.
If 29 AMS is there it must be 00000029
IF 703 AMS is there it must be 00000703
IF 19243 AMS is there it must be 00019243
Here the AMS word must be removed and Prefixed with Zero’s to
make it a 8 Digit
Request you to Please help.
Thanks and regards,
Gayathri

Answer 1

This..?
sql>
with qry as(
  select '14853 AMS' id from dual union all
  select '10511 AMS' id from dual union all
  select '13625 TXT' id from dual union all
  select '29 AMS' id from dual union all
  select '703 AMS' id from dual union all
  select '8245 XXX'  id from dual union all
  select '12675 AMS' id from dual)
select id,decode(instr(id,'AMS'),0,'PVT','AMS') code,
      decode(instr(id,'AMS'),0,null,lpad(trim(replace(id,'AMS','')),8,'0')) RNO
from qry;
ID COD RNO 
14853 AMS  AMS  00014853 
10511 AMS  AMS  00010511 
13625 TXT  PVT    
29 AMS  AMS  00000029 
703 AMS  AMS  00000703 
8245 XXX  PVT    
12675 AMS  AMS  00012675
jeneesh