Question

我正在尝试更改一组列中的美元金额

我尝试了几种WHEN和THEN组合

我可以使用dbo.cards中的select来选择我需要的所有行。然后从这些行开始，有一列称为“ RecurringBillingAmount”，我现在尝试将“ RecurringBillingAmount”列中的值从29.98更改为34.98

select * from dbo.cards WHERE productcode = '2x $19.99 SUBSCRIPTI'
WHEN RecurringBillingAmount = '29.98' THEN '34.98'

Answer 1

尝试一下：

select *,
case WHEN RecurringBillingAmount = '29.98' 
     THEN '34.98' 
end as new_amount
from dbo.cards WHERE productcode = '2x $19.99 SUBSCRIPTI'

这会将一列添加到您的输出中。

由于您要使用新列替换旧列，因此请不要在select语句中包括旧列。

Answer 2

这是您要找的吗？假设您要更新表，而不仅仅是在查询结果中显示更改。

UPDATE dbo.cards 
  SET RecurringBillingAmount = '34.98'
WHERE 
  productcode = '2x $19.99 SUBSCRIPTI'
  AND
  RecurringBillingAmount = '29.98';

Answer 3

尝试一下...

SELECT
CASE 
    WHEN RecurringBillingAmount = '29.98' THEN '34.98' 
    ELSE RecurringBillingAmount
END  RecurringBillingAmount
FROM dbo.cards 
WHERE productcode = '2x $19.99 SUBSCRIPTI'

替换列中的值

3 个答案: