SQL Server：拆分、筛选和重组答案

【问题标题】：SQL Server: Split, Filter and RecombineSQL Server：拆分、筛选和重组
【发布时间】：2017-07-10 02:12:39
【问题描述】：

我想按 ContactID 分组，并且只重新组合具有不同自动编号计数 > 1 的组。使用 Pandas，我会执行以下操作：

refinance_data = refinance_data.groupby('ContactID').filter(lambda x: x.AutoNumber.nunique() > 1)

我的 SQL 查询...

SELECT Ge.LoanAgreementID, Ge.Amount, Ge.ContactID, Ge.TransactionDate, Lo.AutoNumber, Ge.GeneralLedgerType FROM GeneralLedger as Ge
JOIN LoanAgreements Lo ON Ge.LoanAgreementID = Lo.LoanAgreementID
GROUP BY Ge.ContactID HAVING COUNT(DISTINCT Lo.AutoNumber) >1;

正在产生以下错误：

Msg 8120, Level 16, State 1, Line 1
Column 'GeneralLedger.LoanAgreementID' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.

【问题讨论】：

请提供 CREATE 脚本并插入一些示例数据，我们很乐意为您提供帮助！

标签： sql sql-server filter split group-by

【解决方案1】：

可能是这个？（如果我理解你的解释正确的话。）我不认识熊猫。

SELECT Ge.LoanAgreementID, Ge.Amount, Ge.ContactID, Ge.TransactionDate, Lo.AutoNumber, GeneralLedgerType GETBND
FROM GeneralLedger AS Ge
JOIN LoanAgreements Lo ON Ge.LoanAgreementID = Lo.LoanAgreementID
WHERE
    Ge.ContactID IN (
SELECT Ge1.ContactID
FROM GeneralLedger AS Ge1
JOIN LoanAgreements Lo1 ON Ge1.LoanAgreementID = Lo1.LoanAgreementID
GROUP BY Ge1.ContactID
HAVING COUNT(DISTINCT Lo1.AutoNumber) >1
)

【讨论】：

是的 - 这是完美的，正是我所需要的。谢谢！

【解决方案2】：

你可以加入contactId：

SELECT Ge.LoanAgreementID, Ge.Amount, Ge.ContactID, Ge.TransactionDate, Lo.AutoNumber, Ge.GeneralLedgerType
FROM GeneralLedger as Ge
INNER JOIN 
 (
    SELECT Ge.ContactID
    FROM GeneralLedger as Ge
    JOIN LoanAgreements Lo ON Ge.LoanAgreementID = Lo.LoanAgreementID
    GROUP BY Ge.ContactID
    HAVING COUNT(DISTINCT Lo.AutoNumber) >1
    ) t
ON Ge.ContactID = t.ContactID;

【讨论】：

【解决方案3】：

选择所有存在多个不同AutoNumber 的LoanAgreementID：

select 
   Ge.LoanAgreementID
 , Ge.Amount
 , Ge.ContactID
 , Ge.TransactionDate
 , Lo.AutoNumber
 , Ge.GeneralLedgerType
from GeneralLedger as Ge
  inner join LoanAgreements Lo 
    on Ge.LoanAgreementID = Lo.LoanAgreementID
where exists (
  select 1 
  from LoanAgreements as i
  where i.LoanAgreementID = Lo.LoanAgreementID
    and i.AutoNumber != Lo.AutoNumber
)

【讨论】：