在SQL语句中选择大小写

Question

我有下面的SQL查询，它返回以下用于员工时间ATTENDANCE的输出。

注意当InOut = '0'它意味着，如果InOut = '1'它意味着。

查询：

SELECT 
    DATEPART(mi, LogTime) AS [InMin], 
    OutletName as [InOutletName] 
FROM 
    [dbo].[AccessLog] 
INNER JOIN 
    dbo.Outlets ON dbo.Outlets.OutletCode = dbo.AccessLog.TerminalID 
WHERE 
    DATEPART(HOUR, LogTime) = '15' 
    AND InOut = '0' 
    AND CAST(LogDate AS date) = '2016-12-01' 

输出：

InMin InOutletName 
-------------------- 
47  GJ-SH1 

我期待在获得OutMin, OutOutletName的输出，这可以应用在InOut = '1'

所需的输出：

InMin InOutletName OutMin OutOutletName 
----------------------------------------- 
47  GJ-SH1  10  GJ-SH1 

Answer 1

我没有得到一个机会来尝试，在我SSMS，但需要查询应该是这样的 -

SELECT 
    Case When InOut = '0' Then DATEPART(mi, LogTime) End AS [InMin], 
    Case When InOut = '0' Then OutletName End as [InOutletName], 
    Case When InOut = '1' Then DATEPART(mi, LogTime) End AS [OutMin], 
    Case When InOut = '1' Then OutletName End as [OutOutletName] 
FROM 
    [dbo].[AccessLog] 
INNER JOIN 
    dbo.Outlets ON dbo.Outlets.OutletCode = dbo.AccessLog.TerminalID 
WHERE 
    DATEPART(HOUR, LogTime) = '15' 
    AND CAST(LogDate AS date) = '2016-12-01'; 

Answer 2

一个简单的解决办法是加入AccessLog表两次：

SELECT 
     DATEPART(mi, ali.LogTime) AS [InMin], 
     DATEPART(mi, alo.LogTime) AS [OutMin], 
     OutletName as [InOutletName] 
FROM dbo.Outlets 
INNER JOIN [dbo].[AccessLog] ali 
ON dbo.Outlets.OutletCode = ali.TerminalID 
LEFT JOIN [dbo].[AccessLog] alo 
ON dbo.Outlets.OutletCode = al0.TerminalID AND CAST(ali.LogDate AS date) = CAST(alo.LogDate AS date) AND alo.InOut = '1' 
WHERE DATEPART(HOUR, LogTime) = '15' 
AND ali.InOut = '0' 
AND CAST(ali.LogDate AS date) = '2016-12-01' 

注意，对于AccessLog代表我已经使用了left join的落伍，让你也将获得一个没有记录的出口名称出来呢。

Answer 3

我刚刚在飞行中写道，不确定结果，但你可以试试。它可以帮助：

;with InQuery as (SELECT 
    DATEPART(mi, LogTime) AS [InMin], 
    OutletName as [InOutletName] 
    FROM [dbo].[AccessLog] 
    INNER JOIN dbo.Outlets 
    ON dbo.Outlets.OutletCode = dbo.AccessLog.TerminalID 
    WHERE DATEPART(HOUR, LogTime) = '15' 
    AND InOut = '0' 
    AND CAST(LogDate AS date) = '2016-12-01'), 
    OutQuery As (SELECT 
    DATEPART(mi, LogTime) AS [OutMin], 
    OutletName as [OutOutletName] 
    FROM [dbo].[AccessLog] 
    INNER JOIN dbo.Outlets 
    ON dbo.Outlets.OutletCode = dbo.AccessLog.TerminalID 
    WHERE DATEPART(HOUR, LogTime) = '15' 
    AND InOut = '1' 
    AND CAST(LogDate AS date) = '2016-12-01') 

    select iq.*, oq.* from InQuery iq, OutQuery oq