查询太复杂

Question

我想将Excel中的一些计算移到我的Access数据库中，但是当我使用上面的5个输入值时，我遇到了'Query too complex'错误。我应该分开查询还是有一个更有效的方法来解决这个问题？任何帮助，将不胜感激！下面是代码：

SELECT qb1.CompanyName, qb1.Assetname, qb1.Year, 
     ((qb1.DatapointValue*1000000)+qb2.DatapointValue+ 
     qb3.DatapointValue+qb4.DatapointValue+qb5.DatapointValue+ 
     qb6.DatapointValue) AS MPPOilRevised 

FROM ((((((PEBaseQuery AS qb1 
INNER JOIN PEBaseQuery AS qb2 ON qb1.AssetName=qb2.AssetName) 
INNER JOIN PEBaseQuery AS qb3 ON qb1.AssetName=qb3.AssetName) 
INNER JOIN PEBaseQuery AS qb4 ON qb1.AssetName=qb4.AssetName) 
INNER JOIN PEBaseQuery AS qb5 ON qb1.AssetName=qb5.AssetName) 
INNER JOIN PEBaseQuery AS qb6 ON qb1.AssetName=qb6.AssetName)) 

WHERE qb1.DatapointID=2003 And qb2.DatapointID=2032 
     And qb3.DatapointID=2034 And qb4.DatapointID=2042 
     And qb5.DatapointID=2036 And qb6.DatapointID=2030; 

---

CompanyName, Year, AssetName, DatapointID, DatapointName, DatapointValue 
CompanyA, 2011, CAAsset1, 2005,  OIL,    170883.740972926 
CompanyA, 2011, CAAsset1, 2032,  Wellwork,  615913 
CompanyA, 2011, CAAsset1, 2034,  Annual shutdown, 0 
CompanyA, 2011, CAAsset1, 2042,  Export,   0 
CompanyA, 2011, CAAsset1, 2036,  Plant,   958387 
CompanyA, 2011, CAAsset1, 2030,  Reservoir,  2394231 

Answer 1

它看起来像你需要的不是这种复杂的聚合查询。例如。

select companyName, assetName, year, 
    Sum(DatapointValue) as MPPOilRevised 
from PEBaseQuery 
where DatapointID in (2032, 2034, 2042, 2036) 
group by companyName, assetName, year 

唯一的问题是第一个数据点乘以1000000。你可以尝试IIF为：

select companyName, assetName, year, 
    Sum(IIf(DatapointID=2003,DatapointValue*1000000,DatapointValue)) as MPPOilRevised 
from PEBaseQuery 
where DatapointID in (2032, 2034, 2042, 2036) 
group by companyName, assetName, year 

另外，请尝试这种“疯狂”的查询，有子查询这个特定DatapointID，没有IIF：

select companyName, assetName, year, SUM(DatapointValue) 
     + (select SUM(DatapointValue * 1000000) from PEBaseQuery q2 
      where q2.companyName = q1.companyName 
       and q2.assetName= q1.assetName 
       and q2.year= q1.year 
       and q2.DatapointID = 2003 
      group by companyName, assetName, year) 
    from PEBaseQuery q1 
    where DatapointID in (2032, 2034, 2042, 2036) 
    group by companyName, assetName, year 

更新“生产最大潜力”。请尝试以下操作：

select b.companyName, b.assetName, IIf(b.calculationResult > mp.calculationResult,b.calculationResult,mp.calculationResult) as MPPOilRevised 
from 
    (select companyName, assetName, year, Sum(IIf(DatapointID=2003,DatapointValue*1000000,DatapointValue)) as calculationResult 
     from PEBaseQuery 
     where DatapointID in (2032, 2034, 2042, 2036) 
     group by companyName, assetName, year) b --Base 
    left join 
    (select companyName, assetName, year, 
     Sum(DatapointValue) as calculationResult 
     from PEBaseQuery 
     where DatapointID = 2218 
     group by companyName, assetName, year) mp -- Max Potential 
    on b.companyName= mp.companyName 
     and b.assetName = mp.assetName 
     and b.year = mp.year 

带减法逻辑的计算示例。 更新与最后的疯狂SQL。另请注意，我将与应用逻辑或存储过程去这样那样的事情：

select b.companyName, b.assetName, IIf(b.calculationResult > mp.calculationResult,b.calculationResult,mp.calculationResult) as MPPOilRevised 
from 
    (select companyName, assetName, year, SUM(DatapointValue) 
     + (select SUM(DatapointValue * 1000000) from PEBaseQuery q2 
      where q2.companyName = q1.companyName 
       and q2.assetName= q1.assetName 
       and q2.year= q1.year 
       and q2.DatapointID = 2003 
      group by companyName, assetName, year) 
     - (select SUM(DatapointValue) from PEBaseQuery q2 
      where q2.companyName = q1.companyName 
       and q2.assetName= q1.assetName 
       and q2.year= q1.year 
       and q2.DatapointID = 2029 
      group by companyName, assetName, year) 
    from PEBaseQuery q1 
    where DatapointID in (2032, 2034, 2042, 2036) 
    group by companyName, assetName, year) b --Base 
    left join 
    (select companyName, assetName, year, 
     Sum(DatapointValue) as calculationResult 
     from PEBaseQuery 
     where DatapointID = 2218 
     group by companyName, assetName, year) mp -- Max Potential 
    on b.companyName= mp.companyName 
     and b.assetName = mp.assetName 
     and b.year = mp.year