Question

我的一个SQL Server 2008查询中出现了令人沮丧的错误。它解析得很好，但在我尝试执行时崩溃了。我得到的错误如下：

Msg 8120，Level 16，State 1，Line 4
柱 'customertraffic_return.company'是因为它在选择列表中无效不包含在任何一个聚合函数或GROUP BY 子句。

SELECT *
FROM   (SELECT ctr.sp_id                     AS spid,
           Substring(ctr.company, 1, 20) AS company,
           cci.email_address             AS tech_email,
           CASE
             WHEN rating IS NULL THEN 'unknown'
             ELSE rating
           END                           AS rating
    FROM   customer_contactinfo cci
           INNER JOIN customertraffic_return ctr
             ON ctr.sp_id = cci.sp_id
    WHERE  cci.email_address <> ''
           AND cci.email_address NOT LIKE '%hotmail%'
           AND cci.email_address IS NOT NULL
           AND ( region LIKE 'Europe%'
                  OR region LIKE 'Asia%' )
           AND SERVICE IN ( '1', '2' )
           AND ( rating IN ( 'Premiere', 'Standard', 'unknown' )
                  OR rating IS NULL )
           AND msgcount >= 5000
    GROUP  BY ctr.sp_id,
              cci.email_address) AS a
WHERE  spid NOT IN (SELECT spid
                FROM   customer_exclude)
GROUP  BY spid,
      tech_email

Answer 1

嗯，错误非常清楚，没有？

您在内部SELECT中选择了这些列：

SPID
公司
tech_email
等级

和您的分组只有其中两个（GROUP BY ctr.sp_id, cci.email_address）。

要么所有四个都需要分组（GROUP BY ctr.sp_id, cci.email_address, company, rating），要么需要将聚合函数（SUM，AVG，MIN，MAX）应用于其他两列（company和{ {1}}）。

或许在这里使用GROUP BY完全是错误的做法 - 你真的想在这做什么？

Answer 2

内部查询：

    SELECT ctr.sp_id                     AS spid,
           Substring(ctr.company, 1, 20) AS company,
           cci.email_address             AS tech_email,
           CASE
             WHEN rating IS NULL THEN 'unknown'
             ELSE rating
           END                           AS rating
    FROM   customer_contactinfo cci
           INNER JOIN customertraffic_return ctr
             ON ctr.sp_id = cci.sp_id
    WHERE  cci.email_address <> ''
           AND cci.email_address NOT LIKE '%hotmail%'
           AND cci.email_address IS NOT NULL
           AND ( region LIKE 'Europe%'
                  OR region LIKE 'Asia%' )
           AND SERVICE IN ( '1', '2' )
           AND ( rating IN ( 'Premiere', 'Standard', 'unknown' )
                  OR rating IS NULL )
           AND msgcount >= 5000
    GROUP  BY ctr.sp_id,
              cci.email_address

在选择中有4个非聚合内容（sp_id，company，email_address，rating）并且您只对其中两个进行分组，因此它会抛出它看到的第一个错误

所以你要么不需要按任何一个分组，要么全部分组

Answer 3

我建议用完全指定的列列表替换*。

Answer 4

您可以按所有选定的列进行分组，也可以在聚合函数中使用其他列（不在group by子句中）（如sum）

你不能：select a,b,c from bla group by a,b 但你可以：select a,b,sum(c) from bla groupy by a,b

SQL Server GROUP BY麻烦！

4 个答案: