Question

嘿伙计们我真的可以使用一些帮助来编写这个IF语句！我设法适应了两个条件，不确定第三个（计算）如何适合。这是伪代码中的计算;

IF Producer_Type = 'Oil', Unallocated OIL&GAS = UnallocatedLossesOIL
IF Producer_Type = 'Gas', Unallocated OIL&GAS = UnallocatedLossesGAS
ELSE Unallocated OIL GAS = UnallocatedLossesOIL(MPPOil ÷ (MPPOil + MPPGas)) + 
UnallocatedLossesGAS(MPPGas ÷ (MPPOil + MPPGas))

这是我的代码：

SELECT qb1.CompanyName, qb1.AssetName, qb1.Year, 
IIf(qb1.Producer_Type='Oil',qb1.DatapointValue, qb2.DatapointValue) AS UnallocatedOilGas
FROM PEBaseQuery AS qb1 INNER JOIN PEBaseQuery AS qb2 ON qb1.Assetname=qb2.AssetName
WHERE qb1.DatapointID=2026 And qb2.DatapointID=2027;

其中，2026的DatapointID为UnallocatedLossesOIL，而2027为UnallocatedLossesGAS。计算需要参考MPPOil和MPPGas值（与特定公司/资产/年份相关，这是两个独立查询的结果......任何帮助都会非常感激！对不起，如果其中一些没有意义..

Answer 1

如何嵌套if条件？我的意思是，如果可能，这应该有效：

SELECT qb1.CompanyName, qb1.AssetName, qb1.Year, 
IIf(qb1.Producer_Type='Oil', qb1.DatapointValue, 
  IIF(qb1.Producer_Type='Gas', qb2.DatapointValue,
   qb1.DatapointValue * (MPPOil / (MPPOil + MPPGas)) + 
   qb2.DatapointValue * (MPPGas / (MPPOil + MPPGas)) )) AS UnallocatedOilGas
FROM PEBaseQuery AS qb1 INNER JOIN PEBaseQuery AS qb2 ON qb1.Assetname=qb2.AssetName
WHERE qb1.DatapointID=2026 And qb2.DatapointID=2027;

关于MPPGas和MPPOil的值，我不知道在哪里可以找到它们，所以请将它们保留原样。我希望这有效。

带有3个备选方案的SQL IF语句

1 个答案: