Sql 如何选择客户最近购买的产品？

在一个包含多个表以及它们之间关系的数据库中，我只想选择去年客户最近的付款

我的问题是这样的：

SELECT
  P.Name,
  EV.EventName,
  FN.Installments,
  FN.PurchaseValue,
  FN.DueDate

FROM ClientPrivate PF
JOIN Client P        ON P.PesControle = PF.PesControle
JOIN ClientClass CP  ON P.PesControle = CP.PesControle
JOIN EVENT EV        ON CP.EveControle = EV.EveControle 
JOIN Class cc        ON cc.CurControle = EV.CurControle   
JOIN Finance FN      ON FN.PesControle = P.PesControle 

它返回我需要的值，只是我只想得到每个客户最近购买的商品，而不是所有商品

---

我编辑以帮助澄清。“Controle”列是键。

无论您的日期列是什么，它都会被放在ROW_NUMBER（）函数的ORDER BY子句中，您就可以开始了

;WITH CTE AS
 (
 SELECT
  P.PesNome,
  EV.EveDescri,
  FN.FinTotParc,
  FN.FinVlrLiquido,
  FN.FinDiaVencto,
  ROW_NUMBER() OVER (PARTITION BY P.PesNome ORDER BY [DateColumn] DESC) rn

FROM PessoaFisica PF
JOIN Pessoa P        ON P.PesControle = PF.PesControle
JOIN CursoPessoa CP  ON P.PesControle = CP.PesControle
JOIN EVENTO EV       ON CP.EveControle = EV.EveControle 
JOIN Curso cc        ON cc.CurControle = EV.CurControle   
JOIN Financeiro FN   ON FN.PesControle = P.PesControle 
  )
SELECT * 
FROM CTE 
WHERE rn = 1

---

我猜

Financeiro.FinDiaVencto

是您的购买日期，

Pessoa.PesControle

是一个人的唯一标识符。如果没有，则需要修改查询。我正在用谷歌翻译葡萄牙语，我还不清楚

SELECT
  P.PesNome,
  EV.EveDescri,
  FN.FinTotParc,
  FN.FinVlrLiquido,
  FN.FinDiaVencto
FROM PessoaFisica PF
JOIN Pessoa P
  ON P.PesControle = PF.PesControle
JOIN CursoPessoa CP
  ON P.PesControle = CP.PesControle
JOIN EVENTO EV
  ON CP.EveControle = EV.EveControle 
JOIN Curso cc
  ON cc.CurControle = EV.CurControle   
JOIN Financeiro FN
  on FN.PesControle = P.PesControle 
WHERE EXISTS (
        SELECT 1
        FROM PessoaFisica PF_s
        JOIN Pessoa P_s
            ON P_s.PesControle = PF_s.PesControle
        JOIN CursoPessoa CP_s
            ON P_s.PesControle = CP_s.PesControle
        JOIN EVENTO EV_s
            ON CP_s.EveControle = EV_s.EveControle 
        JOIN Curso cc_s
            ON cc_s.CurControle = EV_s.CurControle   
        JOIN Financeiro FN_s
            on FN_s.PesControle = P_s.PesControle 
        WHERE P_s.PesControle = P.PesControle
        HAVING MAX(FN_s.FinDiaVencto) = FN.FinDiaVencto
    )

这将返回每个

Pessoa.PesControle

的最新

Financeiro.FinDiaVencto

记录。如果按课程或事件（？）需要它，则还需要修改

WHERE

子句以加入这些字段

---

我不确定加入PessoaFisica是否必要，但我加入了它，因为它可能会消除记录。您可以在子查询中包含一个

分组依据

，但它应该是多余的。

哪列是客户机和日期的标识符？你的列名不清楚。我猜

PesNome

是name，哪一个是date列？Fin=End，Dia=Day，Nome=name，感谢谷歌翻译：）