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我有个问题。

我正在尝试获取一个 BIT 值来检查是否有人在昨晚 10 点到午夜之间进入了大楼。当我自己运行子查询代码时，它会给我我需要的结果。当我使用 SSRS2008 时，我需要所有结果都在同一个存储过程中。

所以问题是，它给了我一些正确的位值，对于那些明显为假的，它给了假，对于那些明显为真的，它给了真。但是对于中间的人（白班，23 岁离开），它给出的结果有点随机。

有人有线索吗？

SELECT DISTINCT TOP 200 
   Events.LoggedTime, 
   PTUsers.Name, 
   PTDoors.PTDoorsID, 
   PTUsers.AccessLevel, 
   CAST(CASE 
           WHEN EXISTS (SELECT Events.LoggedTime 
                        FROM Events 
                        INNER JOIN PTUsers AS PTUsers_1 ON Events.GlobalIndex1 = PTUsers.GlobalRecord 
                        INNER JOIN PTDoors AS PTDoors_1 ON Events.RecordIndex2 + 1 = PTDoors.Address
                        WHERE (DATEPART(day, Events.LoggedTime) = DATEPART(day, GETDATE() - 1)) 
                          AND (DATEPART(hour, Events.LoggedTime) IN (22, 23)) 
                          AND (PTDoors_1.PTDoorsID = 14)) THEN 1 ELSE 0 END AS BIT) AS Night
FROM         
    Events 
INNER JOIN
    PTUsers ON Events.GlobalIndex1 = PTUsers.GlobalRecord 
INNER JOIN
    PTDoors ON Events.RecordIndex2 + 1 = PTDoors.Address
WHERE     
    (PTUsers.Panel = 0) 
    AND (PTDoors.Panel = 0) 
    AND (PTDoors.PTDoorsID = 14) 
    AND (DATEPART(day, Events.LoggedTime) = DATEPART(day, GETDATE()) - 1) 
    AND (PTUsers.AccessLevel IN (3))
ORDER BY 
    Events.LoggedTime DESC
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2 回答 2

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@lrd 我做了您建议的更正，感谢您指出表格别名:)

我删除了演员表，所以现在我得到了 BIT 列。但现在的问题是我得到所有“1”的结果。令我困惑的是，子查询本身就应该作为查询工作。它可以追溯到一天，并在给定的时间范围内显示该门上的条目。

现在我正在尝试比较同一个人的信息，这意味着 - 我在列表中看到一个人，昨天早上 6 点到达，检查那个人是否也在前一天在 22 点和午夜之间到达，并返回一个位值以显示那。

SELECT DISTINCT TOP 200 Events.LoggedTime, PTUsers.Name, PTDoors.PTDoorsID, PTUsers.AccessLevel, CASE WHEN EXISTS
                          (SELECT     Events.LoggedTime
                            FROM          Events INNER JOIN
                                                   PTUsers AS PTUsers_1 ON Events.GlobalIndex1 = PTUsers_1.GlobalRecord INNER JOIN
                                                   PTDoors AS PTDoors_1 ON Events.RecordIndex2 + 1 = PTDoors_1.Address
                            WHERE      (DATEPART(day, Events.LoggedTime) = DATEPART(day, GETDATE() - 1)) AND (DATEPART(hour, Events.LoggedTime) IN (22, 23)) AND 
                                                   (PTDoors_1.PTDoorsID = 14)) THEN 1 ELSE 0 END AS BIT
FROM         Events INNER JOIN
                      PTUsers ON Events.GlobalIndex1 = PTUsers.GlobalRecord INNER JOIN
                      PTDoors ON Events.RecordIndex2 + 1 = PTDoors.Address
WHERE     (PTUsers.Panel = 0) AND (PTDoors.Panel = 0) AND (PTDoors.PTDoorsID = 14) AND (DATEPART(day, Events.LoggedTime) = DATEPART(day, GETDATE()) 
                      - 1) AND (PTUsers.AccessLevel IN (3))
ORDER BY Events.LoggedTime DESC
于 2014-10-10T10:43:01.823 回答
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我认为您不需要 CAST，因为您通过将结果设置为 EXISTS() 明确地将 Night 定义为 BIT，这有点。我删除了不正确的查询。

我看到了你的问题。您没有在子查询中为连接约束使用正确的表别名。

它应该是：

INNER JOIN PTUsers AS PTUsers_1 ON Events.GlobalIndex1 = PTUsers_1.GlobalRecord 
INNER JOIN PTDoors AS PTDoors_1 ON Events.RecordIndex2 + 1 = PTDoors_1.Address

此外，请检查并确保您在联接中使用了正确的值。我会更改以下内容进行测试。

FROM Events Events_2
INNER JOIN PTUsers AS PTUsers_1 ON Events_2.GlobalIndex1 = PTUsers_1.GlobalRecord 
INNER JOIN PTDoors AS PTDoors_1 ON Events_2.RecordIndex2 + 1 = PTDoors_1.Address
于 2014-10-09T17:02:18.393 回答