Specifying negative precision will round numbers on the left side of the decimal point, as shown here:

  
SQL>
SQL> SELECT ROUND(109.09 ,-1) rounded from dual;

   ROUNDED
----------
       110

SQL>

1.	ROUND: Returns the number rounded to nearest value (precision adjustable)
2.	Syntax: ROUND(,)
3.	ROUND(5.75)
4.	Simple demo for ROUND: round a number
5.	ROUND with precision
6.	ROUND(44.647, -1)
7.	ROUND(Number,1): round values from column
8.	ROUND(Number,0)
9.	ROUND(Number,-1)
10.	Round an AVG function
11.	Use ROUND function in PL/SQL
12.	round Demo
13.	Round date to day
14.	Round price as new price
15.	Round result from months_between
16.	Rounding Up and Down
17.	Rounds 7:45:26 P.M. on May 25, 2005, to the nearest hour
18.	Rounds May 25, 2005, to the first day in the nearest month

Specifying negative precision will round numbers on the left side of the decimal point, as shown here: : ROUND « Numeric Math Functions « Oracle PL / SQL