如何在2007年访问总计

Question

我的初步问题看似简单，但查看表格会显示我的问题：

**Parts used    Model   Fleet # QTY in Stock    QTY used**
Oil filter     TLC 2010   A96         38         1
Oil filter     TLC 2010   A82         38         1
Air filter     TLC 2010   A96         24         1
Air filter     TLC 2010   A82         24         1
Fuel filter    TLC 2010   A96         30         1

如何为总油过滤器，空气过滤器和燃油滤清器制作总计，然后从我的库存查询中减去这些总数？

Answer 1

你的意思是：

SELECT 
  s.PartsUsed, 
  s.SumOfQtyUsed, 
  q.QTYInStock, 
  [QTYInStock]-[SumOfQtyUsed] AS Result
FROM (
      SELECT 
        PartsUsed, 
        Sum(QTYUsed) AS SumOfQTYUsed
      FROM SampleData
      GROUP BY PartsUsed)  AS s 
INNER JOIN (
      SELECT DISTINCT 
        PartsUsed,
        QTYInStock 
      FROM SampleData)  AS q 
ON s.PartsUsed = q.PartsUsed