Provide a small code example of use of the ROUND function and explain what this code does

Example: Explain the ROUND () function and its Syntax

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)