Sql 如何根据合并列的值按查询筛选组？

我的查询不起作用，因为它显然违反了HAVING子句的规则：

SELECT
      COALESCE(Publisher.name, Affiliate.name) AS Publisher
     ,dbo.SumKeys(Item.id) AS ItemIDs
FROM
    Item
    INNER JOIN ItemAccountingStatus ON Item.item_accounting_status_id = ItemAccountingStatus.id
    INNER JOIN Affiliate ON Item.affid = Affiliate.affid
    INNER JOIN Currency AffiliateCurrency ON Affiliate.currency_id = AffiliateCurrency.id
    INNER JOIN Campaign ON Item.pid = Campaign.pid
    INNER JOIN CampaignStatus ON Campaign.campaign_status_id = CampaignStatus.id
    LEFT OUTER JOIN Publisher ON Affiliate.affid = Publisher.affid
GROUP BY
     COALESCE(Publisher.name, Affiliate.name)
    ,ItemAccountingStatus.name
    ,CampaignStatus.name    
HAVING (
    ItemAccountingStatus.name='default'
    and CampaignStatus.name='Verified'
    and Publisher='AdsMain LLC' -- THIS BREAKS THE QUERY
)

问题：有没有办法做到这一点

SELECT * FROM
(
    SELECT
          COALESCE(Publisher.name, Affiliate.name) AS Publisher
         ,dbo.SumKeys(Item.id) AS ItemIDs
    FROM
        Item
        INNER JOIN ItemAccountingStatus ON Item.item_accounting_status_id = ItemAccountingStatus.id
        INNER JOIN Affiliate ON Item.affid = Affiliate.affid
        INNER JOIN Currency AffiliateCurrency ON Affiliate.currency_id = AffiliateCurrency.id
        INNER JOIN Campaign ON Item.pid = Campaign.pid
        INNER JOIN CampaignStatus ON Campaign.campaign_status_id = CampaignStatus.id
        LEFT OUTER JOIN Publisher ON Affiliate.affid = Publisher.affid
    GROUP BY
         COALESCE(Publisher.name, Affiliate.name)
        ,ItemAccountingStatus.name
        ,CampaignStatus.name    
    HAVING (
        ItemAccountingStatus.name='default'
        and CampaignStatus.name='Verified'
    )
) A
WHERE A.Publisher='AdsMain LLC'

列别名仅在ORDER BY中允许。必须在WHERE、GROUP BY、HAVING等中使用表达式（生成别名列）。您已经按照预期在GROUP BY中使用了该表达式

有些DBMS允许您在其他地方引用列别名，但不允许在SQL Server中引用列别名，我认为这使发生的事情更加明显

或者，您可以使用派生表/CTE方法，并从中进行选择（根据您的自我回答）

根据“SELECT语句的逻辑处理顺序”

…相反，由于SELECT子句是步骤8，因此前面的子句不能引用该子句中定义的任何列别名或派生列。但是，它们可以由后续的子句（如ORDER by子句）引用。请注意，语句的实际物理执行由查询处理器决定，并且顺序可能与此列表不同

从

在

加入

在哪里

分组

使用多维数据集还是使用汇总

有（gbn:别名不可用）

选择（gbn：此处生成的别名）

明显的

订购人

顶

---

我怀疑您是否需要having子句-请在下面的where子句中尝试

SELECT
      COALESCE(Publisher.name, Affiliate.name) AS Publisher
     ,dbo.SumKeys(Item.id) AS ItemIDs
FROM
    Item
    INNER JOIN ItemAccountingStatus ON Item.item_accounting_status_id = ItemAccountingStatus.id
    INNER JOIN Affiliate ON Item.affid = Affiliate.affid
    INNER JOIN Currency AffiliateCurrency ON Affiliate.currency_id = AffiliateCurrency.id
    INNER JOIN Campaign ON Item.pid = Campaign.pid
    INNER JOIN CampaignStatus ON Campaign.campaign_status_id = CampaignStatus.id
    LEFT OUTER JOIN Publisher ON Affiliate.affid = Publisher.affid
where 
    ItemAccountingStatus.name='default'
    and CampaignStatus.name='Verified'
    and Publisher='AdsMain LLC' 
GROUP BY
     COALESCE(Publisher.name, Affiliate.name)
    ,ItemAccountingStatus.name
    ,CampaignStatus.name    

---

回答了我自己的问题-值得保留还是应该删除？我会保留-如果其他人遇到相同的问题，他们可能会很高兴找到答案@马克：补充回答。它是“为什么我不能在WHERE子句中访问我的列别名”的变体，或者您可以简单地添加

并合并（Publisher.name、Affiliate.name）='AdsMain LLC'

添加到Having子句中，而不是使用派生表。更好的做法是按照josephj1989quick follow的建议，将其添加到Where子句中-我实际上得到了“无效列名”Publisher“”。

SELECT
      COALESCE(Publisher.name, Affiliate.name) AS Publisher
     ,dbo.SumKeys(Item.id) AS ItemIDs
FROM
    Item
    INNER JOIN ItemAccountingStatus ON Item.item_accounting_status_id = ItemAccountingStatus.id
    INNER JOIN Affiliate ON Item.affid = Affiliate.affid
    INNER JOIN Currency AffiliateCurrency ON Affiliate.currency_id = AffiliateCurrency.id
    INNER JOIN Campaign ON Item.pid = Campaign.pid
    INNER JOIN CampaignStatus ON Campaign.campaign_status_id = CampaignStatus.id
    LEFT OUTER JOIN Publisher ON Affiliate.affid = Publisher.affid
where 
    ItemAccountingStatus.name='default'
    and CampaignStatus.name='Verified'
    and Publisher='AdsMain LLC' 
GROUP BY
     COALESCE(Publisher.name, Affiliate.name)
    ,ItemAccountingStatus.name
    ,CampaignStatus.name