SQL：SELECT FROM（SELECT，SELECT）

-1

我从一个计数器接收数据，并且我想创建一个打印每小时增加多少的报告。SQL：SELECT FROM（SELECT，SELECT）

我做了这个查询，但我不能从0到23小时

SELECT [COLUMN_A], 
     [COLUMN_B], 
     [COLUMN_A] - [COLUMN_B] AS TOTAL 


FROM (
    (SELECT MAX([_Counter]) AS COLUMN_A 
    FROM [DADOS].[dbo].Table_Producao] 
    WHERE DatePart(HOUR, _TimeStamp)=9)AS PART_A 

    CROSS JOIN(SELECT MAX([_Count]) AS COLUMN_B 
       FROM [DADOS].[dbo].[Table_Producao] 
       WHERE DatePart(HOUR, _TimeStamp)=8)AS PART_B 
    )

我有什么做一个SELECT：

_TimeStamp    _Counter 
2015-02-03 14:00:00.000  2 
2015-02-03 14:59:00.000  15 
2015-02-03 15:00:00.000  17 
2015-02-03 15:30:00.000  30 
2015-02-03 15:59:00.000  42 
2015-02-03 16:00:00.000  43 
2015-02-03 16:30:00.000  50 
2015-02-03 16:59:00.000  59 
2015-02-03 17:00:00.000  61 
2015-02-03 17:30:00.000  70 
2015-02-03 17:50:00.000  82 
2015-02-03 18:00:00.000  86 
2015-02-03 18:30:00.000  90 
2015-02-03 18:59:00.000  99 
2015-02-03 19:00:00.000  102 
2015-02-03 19:30:00.000  115 
2015-02-03 19:59:00.000  124 
2015-02-03 20:00:00.000  126 
2015-02-03 20:30:00.000  137 
2015-02-03 20:59:00.000  145 
2015-02-03 21:00:00.000  147

我想要什么：

_TimeStamp  _Counter 
14h     17 
15h     27 
16h     17 
17h     23 
18h     17 
19h     25 
20h     21 
21h     2

任何想法？请

来源

2015-02-06 diogo_k

试试这个。

SELECT Cast(Datepart(hh, [_timestamp]) AS VARCHAR(3))+ 'h', 
     Sum(_counter) 
FROM your_result 
GROUP BY Cast(Datepart(hh, [_timestamp]) AS VARCHAR(3))+ 'h', 
      Cast(_timestamp AS DATE)

来源

2015-02-06 17:25:51

请解释你的答案在努力帮助OP了解您的解决方案的代码做什么 – indubitablee 2015-02-06 18:26:19

我解决了我的qestion与此查询：

WITH QUERY1 AS 
    (SELECT MAX(_Counter) AS MAX_1, Datepart(hh, [TimeStamp]) AS _TIMESTAMP1 
    FROM Table 
    WHERE Cast(DatePart(hh, TimeStamp)AS int) IN (SELECT Cast(Datepart(hh, [TimeStamp]) AS int) 
    FROM Table 
    WHERE TimeStamp>=CAST('<%DataQuery%>'+' 00:00:00.000' AS DATETIME) AND TimeStamp<=CAST('<%DataQuery%>'+' 23:59:59.999' AS DATETIME) 
    ) 
    GROUP BY Cast(Datepart(hh, [TimeStamp])AS int)), 

    QUERY2 AS 
    (SELECT MAX(_Counter) AS MAX_2, Datepart(hh, [TimeStamp]) AS _TIMESTAMP2 
    FROM PLASCAR_DADOS.dbo.Table_Producao 
    WHERE Cast(DatePart(hh, TimeStamp)AS int) IN (SELECT Cast(Datepart(hh, [TimeStamp]) AS int)+1 
    FROM Table 
    WHERE TimeStamp>=CAST('<%DataQuery%>'+' 00:00:00.000' AS DATETIME) AND TimeStamp<=CAST('<%DataQuery%>'+' 23:59:59.999' AS DATETIME) 
    ) 
    GROUP BY Cast(Datepart(hh, [TimeStamp])AS int)) 


    SELECT _TIMESTAMP1, MAX_2-MAX_1 AS TOTAL 
    FROM QUERY1 INNER JOIN QUERY2 ON _TIMESTAMP1 =_TIMESTAMP2-1

来源

2015-02-10 10:37:43

SQL：SELECT FROM（SELECT，SELECT）

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