SQL服务器向下舍入0.5步

Question

我想用0.5步舍入小数值：

示例：

 declare @value = 6.7

round (@value, 1, 2) as new

所有值应为：

if 6.7 should return 6.5
if 6.9 should return 6.5
if 6.4 should return 6 etc.