How to create nested CASE statements in PL/SQL

Question

Can anyone please tell how to create Nested CASE statements in PL/SQL with proper syntax?
It would be better if you can help with an example.
Thank you!

Answer 1

Something like this:
SQL> set serveroutput on
SQL> declare
  2    v1 number := 2;
  3    v2 varchar2(1) := 'C';
  4  begin
  5    case v1
  6      when 1 then dbms_output.put_line('First');
  7      when 2 then begin
  8                    case v2
  9                      when 'A' then dbms_output.put_line('Found A');
10                      when 'B' then dbms_output.put_line('Found B');
11                      when 'C' then dbms_output.put_line('Found C');
12                      else dbms_output.put_line('NONE');
13                    end case;
14                  end;
15      else dbms_output.put_line('Else');
16    end case;
17  end;
18  /
Found C
PL/SQL procedure successfully completed
SQL> If you have further doubts regarding syntax you can read the docs on the Case statement here:
http://download.oracle.com/docs/cd/E11882_01/appdev.112/e10472/case_statement.htm