简化T-SQL查询

如果可能，我想简化这个查询。简化T-SQL查询

SELECT 
    MAX(tDateTimeOfSurvey) 
FROM 
    Stocks.dbo.tblSurvey 
WHERE 
    ( 
     (SELECT ISNULL(SUM(tWetTons), 0) 
     FROM Stocks.dbo.tblSurvey 
     WHERE tStockAreaID = 3 
      AND tDateTimeOfSurvey BETWEEN '20140201' AND '20140228') + 
     (SELECT ISNULL(SUM(tWetTons), 0) 
     FROM Stocks.dbo.tblSurvey 
     WHERE tStockAreaID = 103 
     AND tDateTimeOfSurvey BETWEEN '20140201' AND '20140228') + 
     (SELECT ISNULL(SUM(tWetTons), 0) 
     FROM Stocks.dbo.tblSurvey 
     WHERE tStockAreaID = 181 
     AND tDateTimeOfSurvey BETWEEN '20140201' AND '20140228') 
    ) > 0 
AND tStockAreaID IN (3,103,181) -- RAS, SOIL, DORB 
AND tDateTimeOfSurvey BETWEEN '20140201' AND '20140228'

非常感谢，皮埃尔

来源

2014-03-06 Pierre Cornelissen

请分享您的DDL的表，一些样本数据和样本结果解释你想达到什么目的？ – Mureinik

你到目前为止尝试过什么？你简化的目标是什么？也就是说，您是否遇到性能问题或结果不正确？ –

这似乎微不足道 - 为什么有三个子查询，当你只有一个'tStockAreaID在（3,103,181）'？ –

请尝试：

SELECT MAX(tDateTimeOfSurvey) 
FROM Stocks.dbo.tblSurvey 
WHERE 
    tStockAreaID IN (3,103,181) AND 
    tDateTimeOfSurvey BETWEEN '20140201' AND '20140228' 
HAVING SUM(tWetTons)>0

来源

2014-03-06 11:54:21 TechDo

是@StuartLC谢谢:) – TechDo

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