小编Mag*_*gda的帖子

我试图将一些计算从Excel中移到我的Access数据库中,但是当我使用5个以上的输入值时,我遇到了"查询太复杂"的错误.我应该拆分查询还是有更有效的解决方法？任何帮助,将不胜感激!这是代码:

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, …

我JFrame在Netbeans中创建了一个并添加了一个JPanel(在不可编辑的代码中自动声明private javax.swing.JPanel jPanel1).

我的表单上有一个按钮,想要在单击按钮时在面板中显示图像 - 但是我不确定显示图像所需的代码.