组和聚合函数问题答案

【问题标题】：Groups and Aggregate functions questions组和聚合函数问题
【发布时间】：2017-06-04 17:49:22
【问题描述】：

SELECT HCIS,ServiceDate,PrimeInsMnemonic,TIN,Amount,SUM(Amount) AS Total
FROM dbo.PbrChargeTransactions
WHERE HCIS = 'ASL'
AND ServiceDate Between'01/01/16' and '12/31/16'
AND PrimeInsMnemonic = 'MED'
AND TIN in ('460224598','46-0224598')
GROUP By HCIS
ORDER BY SUM(Amount)

我得到的错误：

消息 8120，第 16 级，状态 1，第 1 行列 'dbo.PbrChargeTransactions.ServiceDate' 在选择列表中无效，因为它不包含在聚合函数或 GROUP BY 子句中。

我希望有人能向我解释为什么这不起作用？

提前感谢您的帮助！

【问题讨论】：

GROUP BY without aggregate function的可能重复

标签： sql

【解决方案1】：

我认为信息很清楚。所有未聚合的列都应该在GROUP BY 中。因此，请删除您不使用的列：

SELECT HCIS, SUM(Amount) AS Total
FROM dbo.PbrChargeTransactions
WHERE HCIS = 'ASL' AND
      ServiceDate Between '2016-01-01' AND '2016-12-31' AND
      PrimeInsMnemonic = 'MED' AND
      TIN in ('460224598','46-0224598')
GROUP By HCIS
ORDER BY SUM(Amount)

【讨论】：

非常感谢。我只是对自己更加努力。我非常感谢您的帮助。

【解决方案2】：

如果它们不在聚合函数中，您应该在 Select 语句中包含要在 Group By 中重复的每一列

SELECT HCIS,ServiceDate,PrimeInsMnemonic,TIN,Amount,SUM(Amount) AS Total FROM dbo.PbrChargeTransactions 其中 HCIS = 'ASL' AND ServiceDate between '01/01/16' 和 '12/31/16' AND PrimeInsMnemonic = 'MED' AND TIN ('460224598','46-0224598') GROUP By HCIS,ServiceDate,PrimeInsMnemonic,TIN,Amount ORDER BY SUM(金额)

【讨论】：

【解决方案3】：

正如他们所说，您必须在选择中按列输入分组。

SELECT HCIS,ServiceDate,PrimeInsMnemonic,TIN,Amount,SUM(Amount) AS Total
FROM dbo.PbrChargeTransactions
WHERE HCIS = 'ASL'
AND ServiceDate Between'01/01/16' and '12/31/16'
AND PrimeInsMnemonic = 'MED'
AND TIN in ('460224598','46-0224598')
GROUP By HCIS,ServiceDate,PrimeInsMnemonic,TIN,Amount
ORDER BY SUM(Amount)

【讨论】：