sql - 在 SQL Server 2008 的 where 子句中使用 if-else

Question

我需要在where条款中实施。

我在语句中尝试过，但在语句case中不能使用case

where 
    if  start_mth < end_mth
        mth_no between start_mth and end_mth
    else start_mth > end_mth
        mth_no between start_mth and 12
                      or
        mth_no between 1 and end_mth

Answer 1

where 
((start_mth<end_mth) and (mth_no   between start_mth and end_mth)) or
((start_mth>end_mth) and ((mth_no  between start_mth and 12) or (mth_no   between  1 and end_mth)))

Answer 2

WHERE 
(start_mth < end_mth AND mth_no BETWEEN start_mth and end_mth)
OR
(start_mth >= end_mth AND 
     (mth_no  BETWEEN start_mth AND 12 
         OR mth_no BETWEEN 1 AND end_mth))