how to round off numbers in sql code example

Example 1: SQL rounding numbers

SELECT 2.555555; --> Result 2.555555
SELECT ROUND(2.555555); --> Result 3
SELECT ROUND(2.555555, 3); --> Result 2.556
SELECT ROUND(2.555555, 0); --> Result 3

Example 2: round in sql

SELECT ROUND (commission_pct, 0)
From employees;