SQL>
SQL> SELECT ROUND(1234.5678, 4) FROM DUAL;
ROUND(1234.5678,4)
------------------
1234.5678
SQL> SELECT ROUND(1234.5678, 3) FROM DUAL;
ROUND(1234.5678,3)
------------------
1234.568
SQL> SELECT ROUND(1234.5678, 2) FROM DUAL;
ROUND(1234.5678,2)
------------------
1234.57
SQL> SELECT ROUND(1234.5678, 1) FROM DUAL;
ROUND(1234.5678,1)
------------------
1234.6
SQL> SELECT ROUND(1234.5678, 0) FROM DUAL;
ROUND(1234.5678,0)
------------------
1235
SQL> SELECT ROUND(1234.5678, -1) FROM DUAL;
ROUND(1234.5678,-1)
-------------------
1230
SQL> SELECT ROUND(1234.5678, -2) FROM DUAL;
ROUND(1234.5678,-2)
-------------------
1200
SQL> SELECT ROUND(1234.5678, -3) FROM DUAL;
ROUND(1234.5678,-3)
-------------------
1000
SQL>