Question

我问了同样的问题，但没有得到最终答案，所以，再试一次。有两种类型的报价，回购利率或最后价格，我想选择具有最高日期时间的回购利率，以及两个表格中具有最高日期时间的最终价格。这是我从最初的帖子得到帮助的答案，但如果两者都存在，我需要两个记录（回购和最后价格）。任何人都可以通过以下更改请求帮助：非常感谢!!

SELECT  QuoteObservations.id, 
        QuoteObservations.value, 
        QuoteObservations.quotePointId,
        max(QuoteObservations.asOfTime) as asOfTime, 
        QuoteObservations.dataProviderId,
        QuotePoints.quoteType 
FROM    QuoteObservations
INNER JOIN
        QuotePoints 
ON      QuoteObservations.quotePointId = QuotePoints.id 
WHERE   QuotePoints.quoteType in (1,2)
group by 
        QuoteObservations.id, 
        QuoteObservations.value, 
        QuoteObservations.quotePointId,
        QuoteObservations.dataProviderId, 
        QuotePoints.quoteType;

Answer 1

您要求返回两行。以下SQL将完成您所描述的内容：

SELECT TOP(1) QuoteObservations.id, 
    QuoteObservations.value, 
    QuoteObservations.quotePointId,
    QuoteObservations.asOfTime, 
    QuoteObservations.dataProviderId,
    QuotePoints.quoteType 
FROM    QuoteObservations
INNER JOIN QuotePoints 
ON      QuoteObservations.quotePointId = QuotePoints.id 
WHERE   QuotePoints.quoteType = 1 -- Get most recent row for quoteType 1
ORDER BY QuoteObservations.asOfTime DESC

UNION ALL 

SELECT TOP(1) QuoteObservations.id, 
    QuoteObservations.value, 
    QuoteObservations.quotePointId,
    QuoteObservations.asOfTime, 
    QuoteObservations.dataProviderId,
    QuotePoints.quoteType 
FROM    QuoteObservations
INNER JOIN QuotePoints 
ON      QuoteObservations.quotePointId = QuotePoints.id 
WHERE   QuotePoints.quoteType = 2 -- Get most recent row for quoteType 2
ORDER BY QuoteObservations.asOfTime DESC

sql，c，选择具有最高时间戳和两个cols的两行

1 个答案: