How to I accumulate a value that exists in multiple tables. Example, I want to determine inventory on hand for a particular Partnumber based on InventoryAdjustments (InvAdj), Receipts (InvReceipts), and Sales (InvSales). Each table contains a date, Partnumber, and Quantity (Qty). The Qty in InvAdj whose date is the Fiscal Year Start Date represents the quantity from the last Physical Inventory. How can I write a query that will go through all tables from the Fiscal Year Start Date for a particular Partnumber and return the total Qty of all three tables. The total should ADD Qty from InvAdj and InvReceipts and SUBTRACT Qty from InvSales.
Thanks, Eddie