Question

我有一个表，其中包含一系列相关记录（批次）。每批都有唯一的ID，并且可以包含客户付款。我想查找一个批次是否重复，即使它是在不同的日期提交的。

一个批次可以有1个或多个记录。这是示例数据集：

BatchId  InputAmount    CustomerName    BatchDate
-------  -----------    ------------    ----------
182944   $475.00        Barry Smith     16-Mar-2019
182944   $260.00        John Smith      16-Mar-2019
182944   $265.00        Jane Smith      16-Mar-2019
182944   $400.00        Sara Smith      16-Mar-2019
182944   $175.00        Andy Smith      16-Mar-2019
182945   $475.00        Barry Smith     16-Mar-2019
182945   $260.00        John Smith      16-Mar-2019
182945   $265.00        Jane Smith      16-Mar-2019
182945   $400.00        Sara Smith      16-Mar-2019
182945   $175.00        Andy Smith      16-Mar-2019
183194   $100.00        Paul Green      21-Mar-2019
183195   $100.00        Nancy Green     21-Mar-2019
183197   $150.00        John Brown      20-Mar-2019
183197   $210.00        Sarah Brown     20-Mar-2019
183198   $150.00        John Brown      21-Mar-2019
183198   $210.00        Sarah Brown     21-Mar-2019
183200   $125.00        John Doe        20-Mar-2019
183200   $110.00        Sarah Doe       20-Mar-2019
183202   $125.00        John Doe        21-Mar-2019
183202   $110.00        Sarah Doe       21-Mar-2019 
183202   $115.00        Paul Rudd       21-Mar-2019

批次（182944、182945）和（183197,183198）是重复的，而其他批次则不是。

我想也许我可以创建一个包含计数和总和的汇总表并取得联系，但是我也很难通过包含名称来查找真正的重复项。

DECLARE @Summaries TABLE(
BatchId INT,
BatchDate DATETIME,
BatchCount INT,
BatchAmount MONEY)

-- Summarize the Data so we can look for duplicates
INSERT INTO @Summaries
SELECT a.BatchId, a.BatchDate, COUNT(*) AS RecordCount, SUM(a.InputAmount) AS BatchAmount 
FROM Batches a
WHERE a.BatchDate BETWEEN '20190316' and '20190321'
GROUP BY a.BatchId, a.BatchDate
ORDER BY a.BatchId DESC

-- find the potential duplicate batches based on the Counts and Sums
SELECT A.* FROM @Summaries A
INNER JOIN (SELECT BatchCount, BatchAmount, BatchDate  FROM @Summaries
            GROUP BY BatchCount, BatchAmount, BatchDate
            HAVING COUNT(*) > 1) B
    ON A.BatchCount = B.BatchCount 
        AND A.BatchAmount = B.BatchAmount 
WHERE DATEDIFF(DAY, a.BatchDate, b.BatchDate) BETWEEN -1 AND 1

感谢您的帮助。我正在使用SQL Server 2012数据库。

Answer 1

您可以尝试以下操作

 with cte as

(select  BatchId  from table_name
group by BatchId  
having count(*)>1
) select * from table_name a where a.BatchId in (select BatchId   from cte)

根据多个列查找重复的批次

1 个答案: