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我有一个 select 语句，我希望根据表中的其他值计算立方体积。但是，我想检查 pr.Length_mm 或 pr.Width_mm 或 pr.Height_mm 之前是否为 NULL。我查看了 CASE 语句，但它似乎一次只评估一列。

SELECT 
      sa.OrderName,
      sa.OrderType,
      pr.Volume_UOM
 ,pr.Length_mm*pr.Width_mm*pr.Height_mm AS Volume_Cubic
 ,pr.Length_mm*pr.Width_mm AS Volume_Floor
 ,pr.Length_mm
 ,pr.Height_mm
 ,pr.Width_mm
FROM CostToServe_MCB.staging.Sale sa
LEFT JOIN staging.Product pr
ON sa.ID = pr.ID
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3 回答 3

2 
SELECT pr.Volume_UOM
 ,pr.Length_mm*pr.Width_mm*pr.Height_mm AS Volume_Cubic
 ,pr.Length_mm*pr.Width_mm AS Volume_Floor
 ,pr.Length_mm
 ,pr.Height_mm
 ,pr.Width_mm
FROM CostToServe_MCB.staging.Sale sa
LEFT JOIN staging.Product pr
ON sa.ID = pr.ID
and pr.Length_mm is not null
and pr.Width_mm is not null
and pr.Height_mm is not null
于 2012-11-02T16:36:11.223 回答
2 
SELECT pr.Volume_UOM
 ,pr.Length_mm*pr.Width_mm*pr.Height_mm AS Volume_Cubic
 ,pr.Length_mm*pr.Width_mm AS Volume_Floor
 ,pr.Length_mm
 ,pr.Height_mm
 ,pr.Width_mm
FROM CostToServe_MCB.staging.Sale sa
    LEFT JOIN staging.Product pr ON sa.ID = pr.ID
where pr.Length_mm is not null and pr.Width_mm is not null and pr.Height_mm is not null
于 2012-11-02T16:36:29.053 回答
0 
where pr.Length_mm is not null 
  and pr.Width_mm is not null 
  and pr.Height_mm is not NULL
于 2012-11-02T16:37:40.737 回答