SQL Round Function

Question

round(45.923,-1) gives a result of 50. Why is this? How it is calculated?

(sorry guys i was mistaken with earlier version of this question suggestin

Answer 1

ROUND(748.58, -1) 750.00

the second parameter: Lenght, is the precision to which numeric_expression is to be rounded. length must be an expression of type tinyint, smallint, or int. When length is a positive number, numeric_expression is rounded to the number of decimal positions specified by length. When length is a negative number, numeric_expression is rounded on the left side of the decimal point, as specified by length.

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