How To rounded to the lowest multiple of 5 in SQL SERVER 2008?

how to round a number to the开发者_JS百科 minimum number that is a multiple of 5

Examples:

• if we have 49 it should be rounded to 45 not 50
• if we have 54 it should be rounded to 50.

This is wrong:

SELECT ROUND(49, -1)

Integer arithmetic will do it

SELECT FLOOR(49/5) * 5,  FLOOR(54/5) * 5