Sybase Query：如何从日期开始获取月份

Question

我在报告中有一个特定的场景，我希望以特定格式获得一个月。

Input : 
Month : 2 Digit OR 1 Digit OR 0

Expectation:
If I pass 2 Digit : e.g. 10 o/p should be 10
If I pass 1 Digit : e.g. 1  o/p should be 01
If I pass 0       : e.g. 0  o/p should be blank

but I need help to when I pass 0 and I get Blank.

Please Help / Advice
AT

Answer 1

我认为这对你有用：

SELECT CASE
         WHEN @month = 0 THEN ''
         ELSE RIGHT ('0' + @month, 2)
       END AS Month