Question

我对Sql很陌生，希望有人能帮忙，我有一个名为Project_Table（pjtID）的表和另一个名为Snag_Table（外键sngProject_ID）的表，然后我有一个FeedBack_Table（外键fdb_Snag_ID）。我需要的是，当用户单击某个障碍时，他们可以编写一条消息，并且当他们返回障碍列表时，它必须不显示他们有任何待处理的消息，但是该用户已被分配为障碍登录看到有一条信息要传达给他们。我如何处理它是否已被读取在其他地方得到处理。我已经构造了一个SQL查询，该查询显示了障碍列表和计数器。

SELECT  COUNT(CASE WHEN fdbRead = 2 THEN 1 ELSE NULL END) AS ReadCount,
        sngCreatedBy,sngAssignedToEmail,sngProject_ID,
        u1.useFullName as Createdname,
        sngCreatedBy,sngID,sngTitle,u2.useFullName as AssignedName,
        sngAssignedTo,sngStatusName,sngDescription,sngStartDate,
        sngDueDate,sngCreatedBy 
FROM Snag_Table 
    INNER JOIN User_Table u1 ON Snag_Table.sngCreatedBy = u1.useID 
    Left JOIN User_Table u2 ON Snag_Table.sngAssignedTo = u2.useID 
    LEFT JOIN FeedBack_Table ON Snag_Table.sngID = fdb_Snag_ID 
WHERE sngProject_ID = 10 
AND sngIsActive = 1 
GROUP BY sngCreatedBy,sngAssignedToEmail,sngProject_ID,
        u1.useFullName,Snag_Table.sngID,Snag_Table.sngTitle,
        u2.useFullName,sngAssignedTo,sngStatusName,sngDescription,
        sngStartDate,sngDueDate  
ORDER BY sngID DESC

我得到的是计数器，而不管是谁登录以及谁创建了反馈。因此，我尝试向查询中添加一些逻辑以根据登录的用户显示计数器，因此我在其中添加了fdbCreatedBy！= 17

SELECT  COUNT(CASE WHEN fdbRead = 2 THEN 1 ELSE NULL END) AS ReadCount,
        sngCreatedBy,sngAssignedToEmail,sngProject_ID,
        u1.useFullName as Createdname,sngCreatedBy,
        sngID,sngTitle,u2.useFullName as AssignedName,
        sngAssignedTo,sngStatusName,sngDescription,sngStartDate,
        sngDueDate,sngCreatedBy 
FROM Snag_Table 
    INNER JOIN User_Table u1 ON Snag_Table.sngCreatedBy = u1.useID 
    Left JOIN User_Table u2 ON Snag_Table.sngAssignedTo = u2.useID 
    LEFT JOIN FeedBack_Table ON Snag_Table.sngID = fdb_Snag_ID 
WHERE *fdbCreatedBy != 17* 
AND sngProject_ID = 10 
AND sngIsActive = 1 
GROUP BY sngCreatedBy,sngAssignedToEmail,sngProject_ID,
        u1.useFullName,Snag_Table.sngID,Snag_Table.sngTitle,
        u2.useFullName,sngAssignedTo,sngStatusName,sngDescription,
        sngStartDate,sngDueDate  
ORDER BY sngID DESC

现在，计数器可以按期望的方式工作，但前提是已经有附加到障碍物的反馈，但是如果我创建新障碍物，则刷新列表时不会显示障碍物。任何帮助将不胜感激。

Answer 1

这可能对您有帮助

从哪里删除条件

WHERE *fdbCreatedBy != 17*

并在您的案例声明中添加该条件

Count(CASE   WHEN (fdbread = 2 and  [fdbcreatedby] != 17 )THEN 1  ELSE NULL   END) AS readcount

如何创建一个SQL查询以显示已读消息的计数器

1 个答案: