Sql 查询以查找缺少的每月付款

Posted 2023-03-23

【中文标题】Sql 查询以查找缺少的每月付款

【英文标题】：Sql Query to find missing monthly payment

【发布时间】：2017-07-15 14:35:06

【问题描述】：

我有一个 SQL 表，其中包含来自组成员的每月分期付款。

Member A : 10 ( Monthly Fee),
Member B : 15 ( Monthly Fee )

我的数据库表

我正在寻找一个可以返回如下的查询。 我需要得到如图所示的结果才能找到丢失的付款

【问题讨论】：

你也考虑年份吗？

是否有可能，例如，在 2017 年 1 月收到 2016 年 12 月的付款记录？

【参考方案1】：

根据您的示例数据和所需的输出，您可以使用PIVOT，尽管我始终建议您在演示应用程序中而不是在数据库查询中使用PIVOT您的数据。

USE
tempdb
GO

IF OBJECT_ID('Payments', 'U') IS NOT NULL
    DROP TABLE Payments
GO

CREATE TABLE Payments(
   Serial# INT  NOT NULL PRIMARY KEY 
  ,Date   DATE  NOT NULL
  ,MemberName VARCHAR(20) NOT NULL
  ,Month  VARCHAR(20) NOT NULL
  ,MonthlyFee INT  NOT NULL
);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (1,'01/01/2017','Member A','January',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (2,'01/01/2017','Member B','January',15);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (3,'01/02/2017','Member A','February',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (4,'01/03/2017','Member B','March',15);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (5,'01/03/2017','Member A','March',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (6,'01/05/2017','Member A','May',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (7,'01/06/2017','Member A','June',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (8,'01/05/2017','Member B','May',15);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (9,'01/09/2017','Member A','September',10);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (10,'01/06/2017','Member B','June',15);
INSERT INTO Payments(Serial#,Date,MemberName,Month,MonthlyFee) VALUES (11,'01/10/2017','Member A','October',10);

SELECT
    MemberName
,   January
,   February
,   March
,   April
,   May
,   June
,   July
,   August
,   September
,   October
,   November
,   December

FROM
(
    SELECT
        MemberName
    ,   Month
    ,   MonthlyFee

    FROM
        Payments
) AS P

PIVOT
(
    SUM(MonthlyFee)
    FOR [Month] IN
    (
        January
    ,   February
    ,   March
    ,   April
    ,   May
    ,   June
    ,   July
    ,   August
    ,   September
    ,   October
    ,   November
    ,   December
    )
) AS Pvt

【参考方案2】：

对于列名的动态列表，和mheptinstall的做法差别不大

Declare @cols1 varchar(max)
Declare @query nvarchar(max)

Select @cols1 = stuff((select top (12) ','+QuoteName(DateName(MONTH,(DateAdd(MM, Row_Number() over(order by (Select NULL))-1, '2017-01-01')))) 
    from master..spt_values for xml path('')),1,1,'')

Select @query = ' Select * from (
    Select MemberName, [Month], MonthlyFee from Payments ) a
    pivot(sum(MonthlyFee) for [Month] in ('+ @cols1 + ') ) p '

Exec SP_ExecuteSql @query