Select numerical when you want to sort numbers by value, such as in 1, 2, 12. Select alphanumerical, when you want to sort the numbers by character code, such as in 1, 12, 2.
如果想按照数值对编号排序（如 1、2、12），请选择数字。如果想按照字符代码对编号排序（如 1、12、2），请选择字母数字。