Generate Upper and Lowercase Alphanumeric Random String in Oracle

Question

How does one generate an upper and lowercase alphanumeric random string from oracle?

I have used select DBMS_RANDOM.STRING(\'x\', 10) from dual to generate

Answer 1

CREATE OR REPLACE FUNCTION fn_mac RETURN varchar2 IS
   w number :=0;
   a varchar2(10);
   b varchar2(50);
   x number :=0;
   y number :=0;
   z number :=0;
   c varchar2(50);
   result varchar2(20);
  BEGIN
  select round(dbms_random.value(1,99))into w from dual;
  SELECT upper(dbms_random.string('A', 2))into a FROM dual;
  SELECT round(dbms_random.value(1, 9)) into x FROM dual;
  SELECT upper(dbms_random.string('A', 4)) into b FROM dual;
  SELECT round(dbms_random.value(1, 9)) into y FROM dual;
  SELECT upper(dbms_random.string('A', 1)) into c FROM dual;
  SELECT round(dbms_random.value(1, 9)) into z FROM dual;
   result :=(  to_char(w) ||a|| to_char(x)|| b|| to_char(y)|| c ||to_char(z)) ;
   DBMS_OUTPUT.PUT_LINE( 'Result ::' || result);
   RETURN result ;
  END fn_mac;
  /