Question

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先前是否为NULL。我查看了CASE语句，但它似乎只能一次评估一列。

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

Answer 1

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

Answer 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

Answer 3

where pr.Length_mm is not null 
  and pr.Width_mm is not null 
  and pr.Height_mm is not NULL

选择查询的多个条件

3 个答案: