Check out example codes for "Explain the ROUND () function and its Syntax". It will help you in understanding the concepts better.

Code Example 1

SELECT ROUND(125.315, 2);
Result: 125.320    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, 2, 0);
Result: 125.320    (result is rounded because 3rd parameter is 0)

SELECT ROUND(125.315, 2, 1);
Result: 125.310    (result is truncated because 3rd parameter is non-zero)

SELECT ROUND(125.315, 1);
Result: 125.300    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, 0);
Result: 125.000    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, -1);
Result: 130.000    (result is rounded because 3rd parameter is omitted)

SELECT ROUND(125.315, -2);
Result: 100.000    (result is rounded because 3rd parameter is omitted)

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