Sql组工作不正常

Question

这是我的查询

select  
 (sum(case when offer1_delivered is not null then 1 else null end) ) as PenetrationRate1
,(sum(case when offer2_delivered is not null then 1 else null end)) as PenetrationRate2
,count(TargetMkgListID) as TargetMkgListID from tablename

输出

PenetrationRate1    PenetrationRate2    TargetMkgListID 
1                   2                3

我需要在此查询中包含customername列

select  customername,
 (sum(case when offer1_delivered is not null then 1 else null end) ) as PenetrationRate1
,(sum(case when offer2_delivered is not null then 1 else null end)) as PenetrationRate2
,count(TargetMkgListID) as TargetMkgListID from tablename
group by customername

如果我在查询中包含customername，则groupby无法正常工作。

Answer 1

SELECT  customername
,(ISNULL(SUM(CASE WHEN offer1_delivered is not null THEN 1 ELSE 0 END),0)) AS PenetrationRate1
,(ISNULL(SUM(CASE WHEN offer2_delivered is not null THEN 1 ELSE 0 END),0)) AS PenetrationRate2
,COUNT(TargetMkgListID) as TargetMkgListID from tablename
GROUP BY customername 

Answer 2

select  customername,
 (sum(case when offer1_delivered is not null then 1 else 0 end) ) as PenetrationRate1
,(sum(case when offer2_delivered is not null then 1 else 0 end)) as PenetrationRate2
,count(TargetMkgListID) as TargetMkgListID from tablename
group by customername

Answer 3

假设表中只有一个customerName值，请尝试

select Min(customername),
       sum(case when offer1_delivered is not null then 1 end) PenetrationRate1,
       sum(case when offer2_delivered is not null then 1 end) PenetrationRate2,
       count(TargetMkgListID) TargetMkgListID 
from tablename

如果表中有多个customerName，则无法将customerName添加到Select子句，仍然可以获得表中所有记录的总和（输出中只有一行）。您只能按每个客户名获取记录总和，这是您的第二个查询应该执行的操作。因此，如果第二个查询不是您想要的，那么您就会遇到问题，因为您想要的内容在逻辑上可能与您拥有的数据无关