Sql 查找和删除表中允许记录多次出现的重复行

我有一个需要删除重复项的表。但是，该表的设计使每个客户都可以拥有相同的项目。下面是一个屏幕截图，例如：

当我尝试删除副本时，我还得到了两个客户的相同图书编号。 绿色区域显示实际副本，而蓝色区域显示不重复的书籍，因为客户可以借用相同的书籍

如何仅在每个客户的行相同的情况下删除？所以绿色区域

这是我的代码：如果两位客户的书号相同，则此代码无效

WITH CTE AS
(
SELECT  *, 
ROW_NUMBER() OVER (PARTITION BY BookNumber ORDER BY BookNumber DESC) AS DUPS
FROM Store.Books 
)

SELECT * FROM CTE WHERE DUPS > 1

---

下面的查询应该为您提供一个带有customerID的所有重复bookNumber的列表，您只需执行一个简单的delete语句，其结果就是删除重复记录

SELECT count(bookNumber), booknumber, customerID FROM TableName GROUP BY booknumber, customerID having count(booknumber)> 1

---

我应该提到，按书号desc排序是不必要的，因此我删除了“desc”部分，这是查找重复数据的方法之一，请尝试=）

或者下面的替代方法

DECLARE @tempTable TABLE(
CustomerID SMALLINT,
BookLoan NVARCHAR(255),
BookNumber INT,
BookAuthor NVARCHAR(255)
)

INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',23457,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'History of Soda',12345,'Brian Adams  ')

;WITH CTE AS
(
SELECT  *, 
ROW_NUMBER() OVER (PARTITION BY CustomerID, BookLoan,BookNumber,BookAuthor 
ORDER BY BookNumber) AS DUPS
FROM @tempTable
)
DELETE FROM @tempTable
WHERE CustomerID = (SELECT CustomerID FROM CTE WHERE DUPS > 1)
AND BookLoan = (SELECT BookLoan FROM CTE WHERE DUPS > 1)
AND BookNumber = (SELECT BookNumber FROM CTE WHERE DUPS > 1)
AND BookAuthor = (SELECT BookAuthor FROM CTE WHERE DUPS > 1)

SELECT * FROM @tempTable

---

非常感谢你！我想我就快到了。

DECLARE @tempTable TABLE(
CustomerID SMALLINT,
BookLoan NVARCHAR(255),
BookNumber INT,
BookAuthor NVARCHAR(255)
)

INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',23457,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'History of Soda',99899,'Brian Adams  ')

Select *,Count(*) 'Occurrance' From @tempTable Group by 
CustomerID,BookLoan,BookNumber,BookAuthor having count(*) > 1


Delete from @temptable
where CustomerID = (Select customerID From @tempTable Group by
CustomerID,BookLoan,BookNumber,BookAuthor having count(*) > 1)
AND BookLoan = (Select BookLoan From @tempTable Group by 
CustomerID,BookLoan,BookNumber,BookAuthor having count(*) > 1)
AND BookNumber = (Select BookNumber From @tempTable Group by 
CustomerID,BookLoan,BookNumber,BookAuthor having count(*) > 1)
AND BookAuthor = (Select BookAuthor From @tempTable Group by 
CustomerID,BookLoan,BookNumber,BookAuthor having count(*) > 1)

Select * from @tempTable

DECLARE @tempTable TABLE(
CustomerID SMALLINT,
BookLoan NVARCHAR(255),
BookNumber INT,
BookAuthor NVARCHAR(255)
)

INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',12345,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'Clash Of Titans',23457,'Dick VanDyke ')
INSERT INTO @tempTable Values(112,'History of Soda',12345,'Brian Adams  ')

;WITH CTE AS
(
SELECT  *, 
ROW_NUMBER() OVER (PARTITION BY CustomerID, BookLoan,BookNumber,BookAuthor 
ORDER BY BookNumber) AS DUPS
FROM @tempTable
)
DELETE FROM @tempTable
WHERE CustomerID = (SELECT CustomerID FROM CTE WHERE DUPS > 1)
AND BookLoan = (SELECT BookLoan FROM CTE WHERE DUPS > 1)
AND BookNumber = (SELECT BookNumber FROM CTE WHERE DUPS > 1)
AND BookAuthor = (SELECT BookAuthor FROM CTE WHERE DUPS > 1)

SELECT * FROM @tempTable