计算MS-Access中同一字段中的两种值

Question

我有这个表customerDetail,其中有一个字段c_type,其中"a"代表"active"而"d"代表"not-active".现在我必须在同一查询中找到它们的计数.
我用过这些但没有结果.

SELECT Count(c_type) AS Active, Count(c_type) AS Not_Active  
FROM customerDetail  
WHERE c_type="a" OR c_type="d"

当然我知道它看起来很脏,但我也尝试了这个,但这也没有用 -

SELECT
    Count(customerDetail.c_type) AS Active,
    Count(customerDetail_1.c_type) AS Not_Active  
FROM customerDetail INNER JOIN customerDetail AS customerDetail_1  
ON customerDetail.Id=customerDetail_1.Id  
WHERE (customerDetail.c_type="a") AND (customerDetail_1.c_type="d")

但是它也没有用,所以有人可以告诉我,我应该如何知道同一查询中活动和非活动的计数？

Answer 1

select c_type, count(*)
from customer_detail
group by c_type