Question

这个多个SELECT QUERY连续运行。我需要一个包含[GBPMID]和[EURMID]多列的报告。

查询1

SELECT
    (([askPrice] - [bidPrice]) / 2) + [bidPrice] AS [EURMID]
    FROM TicksForex 
        WHERE [Symbol] = 'EUR/USD' 
        AND [Time] >= CONVERT(datetime, '6/6/2011 12:00 AM')

查询2

SELECT
     [Time]
    ,[askPrice]
    ,[bidPrice]
    ,(([askPrice] - [bidPrice]) / 2) + [bidPrice] AS [GBPMID]
    FROM TicksForex 
        WHERE [Symbol] = 'GBP/USD'  
        AND [Time] >= CONVERT(datetime, '6/6/2011 12:00 AM')

@Pranay＆amp; @Magnus - 我的APOLOGIES！我的数据表不共享相同的TIME值...这对我来说是一个惊喜..这就是为什么记录不排队..很抱歉！我将按照@Pranay在下面描述的那样运行...

算了吧！它标准化了数据（日期），因此他们共享相同的日期 - 即..同时更新价格..但它仍然不起作用!!

Answer 1

利用Case...when可以轻松解决问题

SELECT
     [Time]
    ,[askPrice]
    ,[bidPrice],

  ( CASE WHEN Symbol = 
          'GBP/USD' THEN ((([askPrice] - [bidPrice]) / 2) + [bidPrice])
         ELSE 0
      END) AS [GBPMID],
  ( CASE WHEN Symbol =
           'EUR/USD' THEN ((([askPrice] - [bidPrice]) / 2) + [bidPrice])
         ELSE 0
      END) AS [EURMID]

    FROM TicksForex 
        WHERE ([Symbol] = 'GBP/USD'  or [Symbol] = 'EUR/USD' )
        AND [Time] >= CONVERT(datetime, '6/6/2011 12:00 AM')

Answer 2

试试这个：

SELECT 
    * 
FROM
    (SELECT
        [Symbol],
        [Time],
        [askPrice],
        [bidPrice],
        ([askPrice] - [bidPrice]) / 2 As calc
    FROM 
        TicksForex
    WHERE 
       ([Symbol] = 'GBP/USD'  or [Symbol] = 'EUR/USD') AND
       [Time] >= CONVERT(datetime, '6/6/2011 12:00 AM')) As srcTable
    PIVOT
    (
        MAX(calc)
        FOR Symbol IN([EUR/USD], [GBP/USD])
    ) As PivotTable

将选择SQL与单个查询和/多列组合

2 个答案: