sql - SQL Server 2008 の where 句での if-else の使用

Question

where節で実装する必要があります。

ステートメントで試しましたが、ステートメントcaseで between を使用できません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)))