Question

以下是我的表概述（Task，TaskSequence，OverallFileProgress和FileProgressStage）

任务：

TaskId  TaskName
1       File Opened
2       File Assigned
3       File Disposed

TaskSequence ：

TaskSequenceId  SequenceNumber  TaskId
1               33              3
2               11              1
3               22              2

OverallFileProgress ：

OverallFileProgressId   WorkId
1                       100
2                       101

FileProgressStage ：

FileProgressStageId OverallFileProgressId   TaskId  IsCompleted
1                   1                       1       1
2                   1                       2       1
3                   1                       3       0
6                   2                       1       1
7                   2                       2       0
8                   2                       3       0

FileProgressStage表用于跟踪每个阶段的文件进度，并将该阶段标记为完成。这类似于Office文件的工作流跟踪。现在我想展示WorkId的当前阶段。根据上述数据，我希望得到下一个未完成的工作当前阶段：

WorkId  TaskId  TaskName    
100     3       File Disposed   
101     2       File Assigned

此处，下一阶段的任务由TaskSequence表格顺序由SequenceNumber决定。因此，每个WorkId将按照TaskSequence表中定义的顺序顺序流动。这意味着WorkId将从FileOpened =＆gt;流出FileAssigned =＆gt; FileDisposed

Answer 1

假设您正在使用tSQL，这应该可以工作：

创建数据集：

CREATE TABLE #Task
                  (
             TaskId INT, TaskName VARCHAR(50)
                  );

INSERT INTO #Task
VALUES
       (1, 'File Opened'
       ),
       (2, 'File Assigned'
       ),
       (3, 'File Disposed'
       );

CREATE TABLE #TaskSequence
                          (
             TaskSequenceId INT, SequenceNumber INT, TaskId INT
                          );

INSERT INTO #TaskSequence
VALUES
       (1, 33, 3
       ),
       (2, 11, 1
       ),
       (3, 22, 2
       );

CREATE TABLE #OverallFileProgress
                                 (
             OverallFileProgressId INT, WorkId INT
                                 );

INSERT INTO #OverallFileProgress
VALUES
       (1, 100
       ),
       (2, 101
       );

CREATE TABLE #FileProgressStage
                               (
             FileProgressStageId INT, OverallFileProgressId INT, TaskId INT, IsCompleted INT
                               );

INSERT INTO #FileProgressStage
VALUES
       (1, 1, 1, 1
       ),
       (2, 1, 2, 1
       ),
       (3, 1, 3, 0
       ),
       (6, 2, 1, 1
       ),
       (7, 2, 2, 0
       ),
       (8, 2, 3, 0
       );

解决方案：

;WITH CTE AS (
      SELECT  C.WorkId  , A.TaskId,B.TaskName , ROW_NUMBER() OVER (PARTITION BY   C.WorkId   ORDER BY  S.SequenceNumber   ) AS rnk
      FROM #FileProgressStage AS A 
          JOIN #Task AS B ON A.TaskId = B.TaskId 
          JOIN #OverallFileProgress AS C ON A.OverallFileProgressId=C.OverallFileProgressId
        JOIN TaskSequence AS S on B.TaskId=S.TaskId
      WHERE A.IsCompleted <> 1   )

      SELECT cte.WorkId,cte.TaskId,cte.TaskName 
      FROM CTE 
      WHERE rnk = 1

结果：

SQL选择表T1中的行，其他表T2中的行序列值最小

1 个答案: