1

从根据3 个不同设备（ReferenceId ）的序列号注册不同操作的日志表开始，我可以使用以下查询为单个序列号选择所需的结果：

DECLARE @serialNumber varchar(256)
SET @serialNumber = 'XXXXX'

SELECT *
FROM Log
WHERE ID IN (
    SELECT TOP 1 ID FROM Log WHERE SerialNumber = @serialNumber AND ReferenceId = 1 ORDER BY Id desc
    UNION
    SELECT TOP 1 ID FROM Log WHERE SerialNumber = @serialNumber AND ReferenceId = 2 ORDER BY Id desc
    UNION
    SELECT TOP 1 ID FROM Log WHERE SerialNumber = @serialNumber AND ReferenceId = 3 ORDER BY Id desc
)
AND Operation = 3

如何使用唯一聚合查询获得所有序列号的结果？

更新

为单个序列号提取的样本数据

SELECT Id, SerialNumber, ReferenceId, Operation FROM ActivationLog WHERE SerialNumber = @serialNumber;

6678    XXXXX   1   0
6991    XXXXX   1   1
6992    XXXXX   1   0
7315    XXXXX   1   1
7317    XXXXX   1   0
7396    XXXXX   1   1
7397    XXXXX   1   0
7581    XXXXX   3   3
7582    XXXXX   3   1
7587    XXXXX   3   3
7588    XXXXX   3   1
7595    XXXXX   1   0
7596    XXXXX   1   1
7597    XXXXX   1   0
7598    XXXXX   1   1
7599    XXXXX   1   0
7632    XXXXX   1   1
7633    XXXXX   1   0
7758    XXXXX   1   1
7784    XXXXX   1   0
7898    XXXXX   1   1
7899    XXXXX   1   0

使用我的查询结果是 0 行。尝试@Tim Biegeleisen 建议的查询（但过滤了单个序列号），我得到 1 行。

SELECT TOP 1 WITH TIES Id, SerialNumber, ReferenceId, Operation
FROM ActivationLog
WHERE ReferenceId IN (1, 2, 3) AND Operation = 3 AND SerialNumber=@serialNumber
ORDER BY ROW_NUMBER() OVER (PARTITION BY SerialNumber ORDER BY Id DESC)

7587    XXXXX   3   3
4

1 回答 1

2

根据您更新的问题，您似乎想要以下内容：

WITH cte AS (
    SELECT *, ROW_NUMBER() OVER (PARTITION BY SerialNumber, ReferenceId
                                 ORDER BY Id DESC) rn
    FROM Log
)

SELECT *
FROM cte
WHERE rn = 1 AND ReferenceId IN (1, 2, 3) AND Operation = 3;
于 2021-02-11T08:37:16.903 回答