Question

我有一个表格，显示项目进入和退出仓库。摄像机1和摄像机2分别记录该项目的进入时间和退出时间。然后摄像机在物品进入时对物品进行分类，并在激光的帮助下离开检查点。例如：大盒子：5级，中型盒子：3级，小盒子：2级。

有时，相机分类并不相互匹配。例如：入口处的分类可以是中等框，退出时可以是小框。

我需要查找班级与同一TransactionDetail不匹配的交易数量，然后查找某些时间范围内所有交易中这些类别不匹配的百分比。

我的表看起来有点像这样：

---------------------------------------------------------------------------
| AVDetailID | TransDetailID | AVClassID | CamID | CreatedDate            |
---------------------------------------------------------------------------
| 20101522   | 54125478      | 5         | 1     | 2017-05-08 10:15:01:560|
| 20101523   | 54125478      | 5         | 2     | 2017-05-08 10:15:01:620|
| 20101524   | 54125479      | 3         | 1     | 2017-05-08 10:15:03:120|
| 20101525   | 54125479      | 2         | 2     | 2017-05-08 10:15:03:860|
| 20101526   | 54125480      | 4         | 1     | 2017-05-08 10:15:06:330|
| 20101527   | 54125480      | 4         | 2     | 2017-05-08 10:15:06:850|
---------------------------------------------------------------------------

因此，在上面的例子中，类在记录3和4中从3变为2.这是类更改的一个事务。我需要获得每个摄像机之间班级变化的所有交易的百分比。

到目前为止，我尝试过的代码是失败的：

SELECT  
    COUNT(TransDetailId)

FROM 
    [AVTransDetail]
WHERE 
    ((SELECT AVCClassId WHERE CamId = 1) <> (SELECT AVCClassId WHERE DetectionZoneId = 2))
    AND CreatedDate >= '2017-04-01'
    AND CreatedDAte <= '2017-04-07'
GROUP BY 
    TransDetailId

Answer 1

您可以尝试像这样加入表格：

SELECT  tdBefore.TransDetailId
FROM    AVTransDetail AS tdBefore
INNER JOIN AVTransDetail AS tdAfter
    ON tdBefore.TransDetailID = tdAfter.TransDetailID 
    AND tdBefore.CamID = 1
    AND tdAfter.CamID = 2
WHERE   tdBefore.AVClassID <> tdAfter.AVClassID 
AND tdBefore.CreatedDate >= '2017-04-01' 
AND tdAfter.CreatedDate <= '2017-04-07'

然后获得百分比：

DECLARE @MinDate DATE = '20170401',
        @MaxDate DATE = '20170407';

SELECT  tdBefore.TransDetailId,
        COUNT(tdAfter.TransDetailID) OVER() AS NumDifferent,
        ((CONVERT(DECIMAL(3, 2), COUNT(tdAfter.TransDetailID) OVER())) / allRecords.Count) * 100 AS DiffPercent,
FROM    AVTransDetail AS tdBefore
INNER JOIN AVTransDetail AS tdAfter
    ON tdBefore.TransDetailID = tdAfter.TransDetailID 
    AND tdBefore.CamID = 1
    AND tdBefore.CamID = 2
CROSS APPLY
(
    SELECT COUNT(*) AS [Count]
    FROM AVTransDetail
    WHERE tdBefore.CreatedDate >= @MinDate
        AND tdAfter.CreatedDate <= @MaxDate
) AS allRecords
WHERE   tdBefore.AVClassID <> tdAfter.AVClassID 
        AND tdBefore.CreatedDate >= @MinDate
        AND tdAfter.CreatedDate <= @MaxDate

比较SQL Server 2014中同一表中的记录

1 个答案: