Question

我需要在表格中选择所有重复项，但重复必须分布在两行中。我尝试了一些引导我使用此代码的东西：

SELECT builder_2, sequence, clientname_2, clientPcode_2, status
  FROM tblClient
 WHERE clientname_2 IN (SELECT clientname_2
                          FROM tblClient
                         GROUP BY clientPcode_2, clientname_2
                        HAVING (COUNT(clientPcode_2) > 1) AND (COUNT(clientname_2) > 1)
                        )
   AND clientPcode_2 IN (SELECT clientPcode_2
                           FROM tblClient
                          GROUP BY clientPcode_2, clientname_2
                         HAVING (COUNT(clientPcode_2) > 1) AND (COUNT(clientname_2) > 1)
                        )
 ORDER BY clientPcode_2, clientname_2

但是，由于显而易见的原因，此代码无法正常工作，它会在两个字段中选择任何重复项，因此如果客户端名称出现在两行中，则会将其视为＆＃34;重复＆＃34;即使邮政编码不匹配。

我尝试做一个单子选择，我会添加主键（数字和序列），但结果不是我想要的，似乎是因为group by。我无法解释，但样本中缺少我的测试数据，所以我拒绝了解决方案。

Answer 1

我认为这样的事情可以满足您的需求。它实质上只是将您的WHERE IN子句移动到更灵活的JOIN。

SELECT  T1.builder_2, T1.sequence, T1.clientname_2, T1.clientPcode_2, T1.status
FROM    tblClient T1
        INNER JOIN 
        (   SELECT  clientname_2, clientPcode_2
            FROM    tblClient
            GROUP BY clientname_2, clientPcode_2
            HAVING COUNT(*) > 1
        ) AS T2
            ON T1.clientname_2 = T2.clientname_2
            AND T1.clientPcode_2 = T2.clientPcode_2

修改

我不确定您希望如何过滤此内容，因此将添加一个示例以显示3种可以过滤数据的方法。

示例数据（仅相关列）

clientname_2 | clientPcode_2 | Status ----------------+-------------------+-------------------- ClientA | M1 2AA | Accepted ClientA | M1 2AA | Pending ClientA | M1 2AA | Rejected ClientB | M1 2AA | Accepted ClientB | M1 2AA | Rejected ClientC | M1 2AA | Accepted ClientC | M1 2AA | Pending SELECT T1.builder_2, T1.sequence, T1.clientname_2, T1.clientPcode_2, T1.status FROM tblClient T1 INNER JOIN ( SELECT clientname_2, clientPcode_2 FROM tblClient WHERE Status NOT LIKE '%Rejected%' -- FILTER A GROUP BY clientname_2, clientPcode_2 HAVING COUNT(*) > 1 AND SUM(IIF(Status LIKE '%Rejected%', 1, 0)) = 0 -- FILTER C ) AS T2 ON T1.clientname_2 = T2.clientname_2 AND T1.clientPcode_2 = T2.clientPcode_2 WHERE Status NOT LIKE '%Rejected%' -- FILTER B

仅限过滤

这将仅限于具有2行或更多行且状态未被拒绝的客户端/邮政编码组合。状态为拒绝的行仍将是返回。

clientname_2 | clientPcode_2 | Status ----------------+-------------------+-------------------- ClientA | M1 2AA | Accepted ClientA | M1 2AA | Pending ClientA | M1 2AA | Rejected ClientC | M1 2AA | Accepted ClientC | M1 2AA | Pending

仅限过滤器

这将找到所有重复的客户端/邮政编码组合，并仅返回状态未被拒绝的行：

clientname_2 | clientPcode_2 | Status ----------------+-------------------+-------------------- ClientA | M1 2AA | Accepted ClientA | M1 2AA | Pending ClientB | M1 2AA | Accepted ClientC | M1 2AA | Accepted ClientC | M1 2AA | Pending

过滤器A和过滤器B

这将仅限制过滤器a的结果集以删除状态被拒绝的行

clientname_2 | clientPcode_2 | Status ----------------+-------------------+-------------------- ClientA | M1 2AA | Accepted ClientA | M1 2AA | Pending ClientC | M1 2AA | Accepted ClientC | M1 2AA | Pending

FILTER C

这将仅返回客户端/邮政编码组合，其中不存在具有相同组合且状态为已拒绝的行：

clientname_2 | clientPcode_2 | Status ----------------+-------------------+-------------------- ClientC | M1 2AA | Accepted ClientC | M1 2AA | Pending

访问SQL，选择多行重复

1 个答案: