修复记录重复时交叉应用行

Question

我有一个 EVENT table，其中包含进入和退出事件。我用这个程序计算工作时间：

SET @worktime = (SELECT SUM(mins)
                 FROM
                     (SELECT
                          entry.EmployeeId, entry.DateTime AS EntryDateTime, 
                          [exit].DateTime AS ExitDateTime, DATEDIFF(MINUTE, entry.DateTime, [exit].DateTime) AS mins
                      FROM
                          Events entry
                      CROSS APPLY 
                          (SELECT TOP 1 e.DateTime
                           FROM Events e
                           WHERE e.EmployeeId = entry.EmployeeId
                             AND e.DateTime > entry.DateTime
                             AND e.EventTypeID = 2
                             AND CAST(e.DateTime AS DATE) = CAST(@data AS DATE)
                             AND e.ControlPointID IN (SELECT ControlPointID 
                                                      FROM ControlPoints 
                                                      INNER JOIN dbo.Split(RIGHT(@rcp, LEN(@rcp) - 2), ';') AS split ON ControlPoints.NAme = split.Data + ' EXIT')
                           ORDER BY e.DateTime ASC) AS [exit]
                      WHERE 
                          entry.EventTypeId = 1 
                          AND EmployeeId = @code 
                          AND CAST(entry.DateTime AS DATE) = CAST(@data AS DATE) 
                          AND ControlPointID IN (SELECT ControlPointID 
                                                 FROM ControlPoints 
                                                 INNER JOIN dbo.Split(RIGHT(@rcp, LEN(@rcp) - 2), ';') AS split ON ControlPoints.NAme = split.Data + ' ENTRY') 
                                                                                                                AND CAST(entry.[DateTime] AS DATE) = CAST(@data AS DATE)) AS input
                 GROUP BY EmployeeId)

例如，某些员工有两个进入和两个退出事件，它工作得很好。但是，如果有一个退出事件和两个进入事件，它就不会像我想的那样工作。

示例：员工 XXX 在 05:44 上班，然后在 06:28 下班。稍后他在 06:50 返回并在 12:33 再次退出。这个程序应该return@worktime等于387分钟。

第二天他犯了一个错误，他来到06:00上班，但是在EVENTStable，有两条相同的记录。他在 14:00 退出（EVENT table 中只有 1 exit 条记录）。程序 returns 960 分钟。我想 returns 480.

当进入事件的数量不等于退出事件的数量（例如：2 次进入和 1 次退出）时，我该如何修复交叉应用？

图片示例：

下面的例子很完美。

选定的行 (1,4,5,8) 已传递给过程。 ControlPointId = 6 是入口点，ControlPointId = 3 是出口点。 EventTypeId = 1 是进入事件，EventTypeId = 2 是退出事件。

但这不起作用：

在这种情况下，ControlPointId = 64 是入口点，ControlPointId = 56 是出口点。我们可以看到，这个Employee犯了错误，ControlPoint读了他的卡片两次，所以有2个进入事件和1个退出事件。

我应该如何更改程序？当出现这样的错误时（或相反的情况：1 次进入和 2 次退出事件），应该只需要第一个进入事件。

Answer 1

你可以试试这个。如果不同的进入事件有相同的退出事件，我使用 ROW_NUMBER

保留第一个进入

SET @worktime = (SELECT SUM(mins)
                 FROM
                     (SELECT
                          entry.EmployeeId, entry.DateTime AS EntryDateTime, 
                          [exit].DateTime AS ExitDateTime, 
                          DATEDIFF(MINUTE, entry.DateTime, [exit].DateTime) AS mins,
                          RN = ROW_NUMBER () OVER (PARTITION BY [exit].EventID ORDER  BY entry.DateTime)
                      FROM
                          Events entry
                      CROSS APPLY 
                          (SELECT TOP 1 e.DateTime, e.EventID
                           FROM Events e
                           WHERE e.EmployeeId = entry.EmployeeId
                             AND e.DateTime > entry.DateTime
                             AND e.EventTypeID = 2
                             AND CAST(e.DateTime AS DATE) = CAST(@data AS DATE)
                             AND e.ControlPointID IN (SELECT ControlPointID 
                                                      FROM ControlPoints 
                                                      INNER JOIN dbo.Split(RIGHT(@rcp, LEN(@rcp) - 2), ';') AS split ON ControlPoints.NAme = split.Data + ' EXIT')
                           ORDER BY e.DateTime ASC) AS [exit]
                      WHERE 
                          entry.EventTypeId = 1 
                          AND EmployeeId = @code 
                          AND CAST(entry.DateTime AS DATE) = CAST(@data AS DATE) 
                          AND ControlPointID IN (SELECT ControlPointID 
                                                 FROM ControlPoints 
                                                 INNER JOIN dbo.Split(RIGHT(@rcp, LEN(@rcp) - 2), ';') AS split ON ControlPoints.NAme = split.Data + ' ENTRY') 
                                                                                                                AND CAST(entry.[DateTime] AS DATE) = CAST(@data AS DATE)) AS input
                 WHERE RN = 1
                 GROUP BY EmployeeId)

修复记录重复时交叉应用行

Fix cross applying rows when records are duplicated

sql-server

tsql

cross-apply