Question

我有一个跟踪一组消耗资产的数据库，并将现有库存与下个月的订单预测进行比较。它通过对每个零件进行存款和取款的总和来处理现有库存（当使用零件或从供应商处收到新零件时，它们会被检入和检出）。

我的差距分析查询采用输入参数Month和Year，并返回现有和预测之间的差距。这适用于已经有过交易的库存零件，但尚未“初始化”到我的交易表中的零件将不会出现在差距分析中。

是否建议只编写一个追加查询，将每个部分的0-sum事务添加到事务表中？这看起来有点脏，但它可能有用，但我想知道是否有更优雅或最佳实践的方法来做到这一点。

这是我的qryGapAnalysis SQL;公平警告，我只是使用Access查询设计，所以它很恶心，但它可能会有所帮助。

SELECT tblInventory.electrodeID, tblJobs.ForecastYear, 
tblJobs.ForecastMonth, tblJobs.jobNumber, tblJobs.Part, tblJobs.partQty, 
tblInventory.partsPerElectrode, [Qty In]-[Qty Out] AS OnHand, 
IIf(Round(([partQty]/[partsPerElectrode])-Sum([Qty In]-[Qty 
Out]))>0,Round(([partQty]/[partsPerElectrode])-Sum([Qty In]-[Qty Out])),0) 
AS Need
FROM ((tblParts INNER JOIN tblInventory ON tblParts.[Part #] = tblInventory. 
[partID]) INNER JOIN tblJobs ON tblParts.[Part #] = tblJobs.Part) INNER JOIN 
tblTransactions ON tblInventory.electrodeID = tblTransactions.Electrode
GROUP BY tblInventory.electrodeID, tblJobs.ForecastYear, 
tblJobs.ForecastMonth, tblJobs.jobNumber, tblJobs.Part, tblJobs.partQty, 
tblInventory.partsPerElectrode, [Qty In]-[Qty Out], tblInventory.electrodeID
HAVING (((tblJobs.ForecastYear)=Forms!frmGapAnalysisParameters!ComboYear) 
And ((tblJobs.ForecastMonth)=Forms!frmGapAnalysisParameters!ComboMonth));

Answer 1

尝试这样的事情：

select a.electrodeID, b.* from 
    (select b.* from tblParts a INNER JOIN tblInventory b ON tblParts.[Part #] = tblInventory)a 
    left join 
    (SELECT tblInventory.electrodeID, tblJobs.ForecastYear, 
    tblJobs.ForecastMonth, tblJobs.jobNumber, tblJobs.Part, tblJobs.partQty, 
    tblInventory.partsPerElectrode, [Qty In]-[Qty Out] AS OnHand, 
    IIf(Round(([partQty]/[partsPerElectrode])-Sum([Qty In]-[Qty 
    Out]))>0,Round(([partQty]/[partsPerElectrode])-Sum([Qty In]-[Qty Out])),0) 
    AS Need
    FROM ((tblParts INNER JOIN tblInventory ON tblParts.[Part #] = tblInventory. 
    [partID]) INNER JOIN tblJobs ON tblParts.[Part #] = tblJobs.Part) INNER JOIN 
    tblTransactions ON tblInventory.electrodeID = tblTransactions.Electrode
    GROUP BY tblInventory.electrodeID, tblJobs.ForecastYear, 
    tblJobs.ForecastMonth, tblJobs.jobNumber, tblJobs.Part, tblJobs.partQty, 
    tblInventory.partsPerElectrode, [Qty In]-[Qty Out], tblInventory.electrodeID
    HAVING (((tblJobs.ForecastYear)=Forms!frmGapAnalysisParameters!ComboYear) 
    And ((tblJobs.ForecastMonth)=Forms!frmGapAnalysisParameters!ComboMonth))) b on a.electrodeID=b.electrodeID

如何在基于交易的库存管理中初始化所有零件的库存？

1 个答案: