SELECT
  CASE
    WHEN level = 1
    THEN '01'
    WHEN level = 2
    THEN '02'
    WHEN level = 3
    THEN '04'
    WHEN level = 4
    THEN '05'
  END TEST
FROM dual
  CONNECT BY level <= 4;

How to increase dbms_output buffer?

 

dbms_output.enable(buffer_size IN INTEGER DEFAULT 20000);
exec dbms_output.enable(1000000);