SQL服務器調換查詢結果

我有下列數據的表：SQL服務器調換查詢結果

ItemId PendingTime 
1  2016-11-23 15:57:56.000 
2  2016-07-09 17:33:09.000 
3  2015-11-27 18:34:03.000

等..

我想知道自去年30分鐘掛起項目的總和，去年1小時，最近1周，最近1個月和超過一年。我想出了以下查詢：

SELECT 
    SUM(CASE 
      WHEN datediff(MINUTE, PENDING_TIME,GETDATE()) <= 30 
       THEN 1 ELSE 0 
     END) AS '30 Min', 
Sum(case when (datediff(MINUTE,PENDING_TIME, GETDATE())) > 30 AND (datediff(MINUTE,PENDING_TIME, GETDATE())) <= 60 then 1 Else 0 End) as 'Over 30 Min', 
Sum(case when (datediff(MINUTE,PENDING_TIME, GETDATE())) > 60 AND (datediff(HOUR,PENDING_TIME, GETDATE())) <= 24 then 1 Else 0 End) as 'Over 1 Hr', 
Sum(case when (datediff(DAY,PENDING_TIME, GETDATE())) > 1 AND (datediff(DAY,PENDING_TIME, GETDATE())) < 30 then 1 Else 0 End) as '1 month', 
Sum(case when datediff(DAY,PENDING_TIME, GETDATE()) >= 30 then 1 Else 0 End) as 'More than month' 
from ItemsTable where datepart(yyyy,PENDING_TIME) = DATEPART(yyyy,GETDATE())

這將返回數據：

30 Min  Over 30 Min Over 1 Hr 1 month  More than month 
----------- ----------- ----------- ----------- --------------- 
100   350  NULL  NULL  NULL

我想在2列格式的結果爲：

30 Min  ------  45 
Over 30  ------ 100 
Over 1 hr ------ null 
Over 1 month ------ null

我知道的pivot函數，但是我選擇的列並不是真的在我正在選擇的表中，而是它們是作爲聚合函數的結果而創建的。

如何以2列和多行格式獲取此內容。

感謝您閱讀。

來源

2016-11-22 Niraj Srivastava

您可以創建一個派生列，其通過該列的等待劃分爲不同的類型，然後組：

With waitCodes As (
    Select Case 
     When DateDiff(Minute, PENDING_TIME, GetDate()) <= 30 Then '30 Min' 
     When DateDiff(Minute, PENDING_TIME, GetDate()) <= 60 Then 'Over 30' 
     When DateDiff(Minute, PENDING_TIME, GetDate()) <= 1440 Then 'Over 1 hr' 
     When DateDiff(Minute, PENDING_TIME, GetDate()) <= 43200 Then '1 month' 
     Else 'More than a month' End As [WaitTime] 
     From ItemsTable 
     Where DatePart(yyyy, PENDING_TIME) = DatePart(yyyy,GetDate())) 
Select [WaitTime], Count(*) As n 
    From waitCodes 
    Group By [WaitTime];

另外，我強烈建議你改變Where子句中查詢以便它不」 t將函數應用於PENDING_TIME列。 There are multiple benefits of this.

... 
Where PENDING_TIME >= Convert(date, Convert(char(4), DatePart(yyyy, GetDate()))+'-01-01 00:00:00.000', 121) 
    And PENDING_TIME < Convert(date, Convert(char(4), DatePart(yyyy, GetDate())+1)+'-01-01 00:00:00.000', 121) 
....

來源

2016-11-22 06:37:20 mendosi

很好的解決方案。順便說一句，替代'WHERE'子句只有在有問題的表沒有未來日期的情況下才有效。 – wdosanjos

@wdosanjos優秀的一點。我認爲這種情況不會發生，但這可能是一個危險的假設。我已經編輯了相應的建議'WHERE'。 – mendosi

順便說一句，看看[這裏]（http://stackoverflow.com/questions/13437362/how-to-get-first-and-last-date-of-current-year）的解決方案如何獲得一年中的第一天和最後一天沒有字符串操作。（yy，DATEDIFF（yy，0，getdate（）），0）和PENDING_TIME wdosanjos

可以跨應用的語句每一部開拓創新的這樣的SQL

SELECT c.* FROM 
    (
     SELECT 
      SUM(CASE 
       WHEN datediff(MINUTE, PENDING_TIME,GETDATE()) <= 30 
        THEN 1 ELSE 0 
      END) AS '30 Min', 
      Sum(case when (datediff(MINUTE,PENDING_TIME, GETDATE())) > 30 AND (datediff(MINUTE,PENDING_TIME, GETDATE())) <= 60 then 1 Else 0 End) as 'Over 30 Min', 
      Sum(case when (datediff(MINUTE,PENDING_TIME, GETDATE())) > 60 AND (datediff(HOUR,PENDING_TIME, GETDATE())) <= 24 then 1 Else 0 End) as 'Over 1 Hr', 
      Sum(case when (datediff(DAY,PENDING_TIME, GETDATE())) > 1 AND (datediff(DAY,PENDING_TIME, GETDATE())) < 30 then 1 Else 0 End) as '1 month', 
      Sum(case when datediff(DAY,PENDING_TIME, GETDATE()) >= 30 then 1 Else 0 End) as 'More than month' 
     from ItemsTable where datepart(yyyy,PENDING_TIME) = DATEPART(yyyy,GETDATE()) 
    ) 
    CROSS APPLY(VALUES('30 MIN',a),('Over 30',b),('Over 1 hr',c),('Over 1 month',d),('More than month',e)) c(title,[value])

結果：

 
title   value 
--------------- ----------- 
30 MIN   100 
Over 30   350 
Over 1 hr  NULL 
Over 1 month NULL 
More than month NULL

來源

2016-11-22 07:33:54

SQL服務器調換查詢結果

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