sql 多列求和

列相加即可
注意Null不可加，先用ISNULL方法驗證，設置默認值

SELECT ID, Name, Province, City, District, ISNULL(row1, 0), ISNULL(row2, 0), ISNULL(row3, 0), ISNULL(row4, 0), ISNULL(row5, 0) + ISNULL(row6, 0) + ISNULL(row7, 0) + ISNULL(row8, 0) AS 'total' FROM O WITH(NOLOCK)