计算多列并总计一个新列

Question

我希望对多个列中的数值进行计数，并将总数计入一个名为'car_total'的新列中

我尝试了一个精选案例，但没有成功

结果应如下所示：

|car_id | merc | toyota |  fiat | car_total
+-------+------+--------+-------+----------
|123567 |    1 |      0 |     0|         1
|567888 |    0 |      1 |     1 |         2

Answer 1

您可以使用下面的sql查询在新列中获取总数

ForFiles /P "%UserProfile%\Desktop\folder" /S /C "Cmd /C If /I Not @ext==0x22lnk0x22 If /I Not @ext==0x22url0x22" Del /A /F @path"

Answer 2

SELECT car_id, 
   merc, 
   toyota, 
   fiat, 
   Sum(merc + toyota + fiat) AS car_total 
FROM   table_name 

OR

SELECT car_id, SUM(mers+toyota +fiat ) AS car_total FROM Cars Group By Id