SQL不同分组？

Question

这里是我的查询：

SELECT 
    dbo.EmailCampaignTracking.emailOpened, 
    dbo.EmailCampaignTracking.emailUnsubscribed, 
    dbo.EmailCampaignTracking.emailBounced, 
    COUNT(*) 
FROM 
    dbo.EmailCampaignTracking 
    Group By 
    dbo.EmailCampaignTracking.emailBounced, 
    dbo.EmailCampaignTracking.emailUnsubscribed, 
    dbo.EmailCampaignTracking.emailOpened 

这里是我的结果如下：

emailOpened emailUnsubscribed emailBounced Totals 

    True   False   False   6  
    False   False   True   1 
    True   True    False   2 

我想总的电子邮件运行结束是8，而不是6.我意识到我问SQL以这种方式将他们分组。我只想知道如何为每列获得Distict总数。所以，emailOpened是8，emailUnsubscribed是1，和emailBounced将2.感谢

Answer 1

SELECT Count(emailOpened) AS OpenedCount, 
Count(emailUnsubscribed) as UnsubCount, 
Count(emailBounced) as BouncedCount 
FROM dbo.EmailCampaignTracking 

编辑：如果你正在寻找数记录在该标志为真时，你可以写如下

SELECT SUM(CASE emailOpened WHEN true then 1 else 0) AS OpenedCount, 
SUM(CASE emailUnsubscribed WHEN true then 1 else 0) as UnsubCount, 
SUM(CASE emailBounced WHEN true then 1 else 0) as BouncedCount 
FROM dbo.EmailCampaignTracking 

EDIT2：在上面的查询中，将true替换为被解释为true（可能为0）的位值。

Answer 2

我假设你只想计数值设置为true的记录。如果是这样，那么这可能会工作：

SELECT SUM(CAST(EmailOpened AS INT)) AS OpenedEmails, 
    SUM(CAST(EmailUnsubscribed AS INT)) AS UnsubscribedEmails, 
    SUM(CAST(EmailBounced AS INT)) AS EmailBounced 
FROM dbo.EmailCampainTracking