SQL> Select CONCAT(TO_CHAR('0.001'*100,'990.99'),'%') FROM DUAL;
CONCAT(TO_CHAR('
----------------
0.10%
SQL> select to_char(1234567.89,'9,999,999.99') id from dual;
ID
--------------------------
1,234,567.89
SQL> select to_char(1234567.89,'999,999,999.99') id from dual;
ID
------------------------------
1,234,567.89
SQL> select to_char(1234567.89,'009,999,999.9900') id from dual;
ID
----------------------------------
001,234,567.8900
SQL> select to_char(1234567.89,'9.99EEEE') id from dual;
ID
--------------------
1.23E+06
SQL> select to_char(1234567.89,'999999.99EEEE') id from dual;
ID
--------------------
1.23E+06
SQL> select to_char(-1234567.89,'999,999,999.99PR') id from dual;
ID
--------------------------------
<,234,567.89>