Question

我使用此查询时收到错误

select dbresultsid, TestCase, BuildID, Analyzed,
     Verdict, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'PASS') AS PASS, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'FAIL') AS FAIL, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'INCONC') AS INCONC, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'TIMEOUT') AS TIMEOUT 
from results 
where BuildID = 'Beta1'       
group by TestCase,dbresultsid 
order by Analyzed

它说

列'results.BuildID'无效选择列表，因为它不是包含在一个聚合中函数或GROUP BY子句。'

相同的查询在MYSQL中运行良好。有人可以帮忙吗？

谢谢，

Answer 1

如果在查询中使用Group By，则必须将所有非聚合函数的列添加到Group By子句中。因此，将BuildID添加到Group By子句和所有其他没有聚合的列（如判决等），它将起作用。

另请参阅GROUP BY documentation了解更多详情。

Answer 2

将您的代码更改为：

select dbresultsid, TestCase, BuildID, Analyzed,
     Verdict, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'PASS') AS PASS, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'FAIL') AS FAIL, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'INCONC') AS INCONC, 
     (select count(Verdict) from results where BuildID = 'Beta1' 
             and Verdict = 'TIMEOUT') AS TIMEOUT 
from results 
where BuildID = 'Beta1'       
group by TestCase,dbresultsid, BuildID, Analyzed
order by Analyzed

虽然您将BuildID过滤为仅一个值，但SQL Server要求在逐个列表中指定它。

Answer 3

SQL Server中的Group By子句允许Group By Clause中的列，如果我们需要其他列，那么我们需要通过MAX，MIN等聚合函数访问它们。

Answer 4

您必须聚合BuildID和Analyzed列，或者将它们添加到组中。还要注意，你现在这样做的方式非常低效。

看看here如何通过只进行一次表扫描来提高性能几百个你将会拥有

Answer 5

分组 - 按列出的字段对结果进行分组，并在其余字段上执行一些聚合函数（sum，avg ...）。没有count（）或avg（）或sum（）的所有东西都必须分组。

但是，看起来您将两个不同的查询混合在一起。如果您对给定的BuildId的每个判定都需要多个记录，则查询只是：

select BuildID, Verdict, count(*)
group by BuildID, Verdict

如果那不是你想要的，你应该描述你想要实现的目标

执行sql server查询时出错

5 个答案: