在SQL語句中選擇大小寫

Question

我有下面的SQL查詢，它返回以下用於員工時間ATTENDANCE的輸出。

注意當InOut = '0'它意味着，如果InOut = '1'它意味着。

查詢：

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' 

輸出：

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

我期待在獲得OutMin, OutOutletName的輸出，這可以應用在InOut = '1'

所需的輸出：

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

Answer 1

我沒有得到一個機會來嘗試，在我SSMS，但需要查詢應該是這樣的 -

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

一個簡單的解決辦法是加入AccessLog表兩次：

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，對於AccessLog代表我已經使用了left join的落伍，讓你也將獲得一個沒有記錄的出口名稱出來呢。

Answer 3

我剛剛在飛行中寫道，不確定結果，但你可以試試。它可以幫助：

;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